USER MANUAL

OLC/OLCT100
GAS DETECTOR

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User Manuals in other languages are available on

Website https://teledynegasandflamedetection.com

Copyright  March 2021 by TELEDYNE OLDHAM SIMTRONICS S.A.S.

All rights reserved. No reproduction of all or part of this document, in any form, is permitted
without the written consent of TELEDYNE OLDHAM SIMTRONICS S.A.S.
All of the information that is provided in this document is accurate to the best of our knowledge.
As a result of continuous research and development, the specifications of this product may be
changed without prior notice.

TELEDYNE OLDHAM SIMTRONICS S.A.S.

Rue Orfila
Z.I. Est – CS 20417
62027 ARRAS Cedex

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Thank you for choosing this TELEDYNE OLDHAM SIMTRONICS instrument.

All of the necessary actions have been taken in order to ensure your complete satisfaction with
this equipment.
It is important that you read this entire manual carefully and thoroughly.

The extent of our responsibility

●The company TELEDYNE OLDHAM SIMTRONICS S.A.S.,hereinafter referred to as TELEDYNE
OLDHAM SIMTRONICS throughout this document, shall not be held responsible for any damage
to the equipment or for any physical injury or death resulting in whole or in part from the
inappropriate use, installation, or storage of the equipment, which is the result of not complying
with the instructions and warnings, and/or with the standards and regulations in force.
TELEDYNE OLDHAM SIMTRONICS does not support or authorise any business, person, or legal
entity in assuming responsibility on behalf of TELEDYNE OLDHAM SIMTRONICS, even though
they may be involved in the sale of TELEDYNE OLDHAM SIMTRONICS products.
TELEDYNE OLDHAM SIMTRONICS shall not be responsible for any damage, direct or indirect,
or for damages and interest, direct or indirect, resulting from the sale and use of any of its products
UNLESS SUCH PRODUCTS HAVE BEEN DEFINED AND CHOSEN BY TELEDYNE OLDHAM
SIMTRONICS FOR THE USE THAT THEY ARE INTENDED.

Ownership clauses
●The drawings, specifications, and information herein contain confidential information that is the
property of TELEDYNE OLDHAM SIMTRONICS.
●This information shall not, either in whole or in part, by physical, electronic, or any other means
whatsoever, be reproduced, copied, divulged, translated, or used as the basis for the
manufacture or sale of TELEDYNE OLDHAM SIMTRONICS equipment, or for any other reason
without the prior consent of TELEDYNE OLDHAM SIMTRONICS.

Warning
This is not a contractual document. In the best interest of its customers and with the aim of
improving performance, TELEDYNE OLDHAM SIMTRONICS reserves the right to alter the
technical features of its equipment without prior notice.
READ THESE INSTRUCTIONS CAREFULLY BEFORE THE FIRST USAGE: these instructions
should be read by all persons who have or will have responsibility for the use, maintenance, or
repair of the instrument.
This instrument shall only be deemed to be in conformance with the published performance if
used, maintained, and repaired in accordance with the instructions of TELEDYNE OLDHAM
SIMTRONICS by TELEDYNE OLDHAM SIMTRONICS personnel or by personnel authorised by
TELEDYNE OLDHAM SIMTRONICS.

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Important Information
The modification of the material and the use of parts of an unspecified origin shall entail the
cancellation of any form of warranty.
The use of the unit has been projected for the applications specified in the technical
characteristics. Exceeding the indicated values cannot in any case be authorized.
Catalytic sensors are susceptible to poisoning by traces of several substances. This leads to an
inhibition which can be permanent or temporary depending on the contaminant, the
concentration of the contaminant, the duration of exposure to the contaminant.
Poisoning may result from exposure to substances as:
• Silicones (e.g. Waterproofing, adhesives, release agents, special oils and greases,
certain medical products, commercial cleaning agents)
• Tetraethyl lead (e.g. Leaded petrol, particularly aviation petrol ‘avgas’)
• Sulfur compounds (sulfur dioxide, hydrogen sulfide)
• Halogenated compounds (r134a, hfo, etc.)
• Organo-phosphorus compounds (e.g. Herbicides, insecticides, and phosphate esters in
fireproof hydraulic fluids
TELEDYNE OLDHAM SIMTRONICS recommends regular testing of fixed gas detection
installations (read Chapter 5).

Guarantee
Under normal conditions of use and on return to the factory, parts and workmanship are
guaranteed for 3 years, excluding such consumables as sensors, filters, etc.

Destruction of the equipment

European Union (and EEA) only. This symbol indicates that, in conformity with
directive DEEE (2002/96/CE) and according to local regulations, this product may
not be discarded together with household waste.
It must be disposed of in a collection area that is set aside for this purpose, for example at a site
that is officially designated for the recycling of electrical and electronic equipment (EEE) or a
point of exchange for authorized products in the event of the acquisition of a new product of the
same type as before.

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Table of Contents

1 Presentation...................................................................................... 1
1.1 Purpose .................................................................................................................. 1
1.2 Operating principle .......................................................................................... 1
1.3 Composition of the detector ........................................................................ 1
1.4 Internal elements ............................................................................................... 2
1.5 Identifiers ............................................................................................................... 3

2 Ranges ............................................................................................... 5
2.1 OLC 100 and OLCT 100 ranges .................................................................... 5

3 Installation ........................................................................................ 6
3.1 Regulations and conditions of use ............................................................. 6
3.2 Necessary equipment ..................................................................................... 6
3.3 Electrical power supply ................................................................................... 7
3.4 Location of the detector ................................................................................ 7
3.5 Detector positioning......................................................................................... 7
3.6 Connector cable............................................................................................... 8
3.7 Cable connection ............................................................................................ 10

4 Calibration ........................................................................................ 13
4.1 Necessary equipment ..................................................................................... 13
4.2 Commissioning ................................................................................................... 13
4.3 Stabilization time ................................................................................................ 14
4.4 Calibrating the OLC 100 ................................................................................. 14
4.5 Calibrating the OLCT 100 ............................................................................... 15

5 Preventive maintenance .............................................................. 21

5.1 Frequency of maintenance .......................................................................... 21
5.2 Actions ................................................................................................................... 22

6 Maintenance ................................................................................... 23

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6.1 Opening the cover ........................................................................................... 23

6.2 Checking the current generator ................................................................. 24
6.3 Possible errors ...................................................................................................... 25
6.4 Replacing sensor block ................................................................................... 26

7 Accessories ...................................................................................... 29
7.1 Cable gland ........................................................................................................ 32

8 Spare parts ....................................................................................... 33

9 Declarations of EU conformity ..................................................... 35

10 Technical specifications ............................................................... 41

10.1 Dimensional characteristics .......................................................................... 41
10.2 General Specifications .................................................................................... 42
10.3 Catalytic sensor (OLCT 100 XP) .................................................................... 43
10.4 Toxic sensors (OLCT 100 XP and OLCT 100 IS) ......................................... 44
10.5 Semiconductor sensors (OLCT 100 XP)...................................................... 47
10.6 Infrared sensors (OLCT 100 XP-IR) ................................................................ 48

12 Specific instructions for use in explosive atmospheres and

operational safety .......................................................................... 51
12.1 General comments .......................................................................................... 51
12.2 Cable Entries ....................................................................................................... 51
12.3 Threaded joints ................................................................................................... 52
12.4 Electrostatic Hazard ......................................................................................... 52
12.5 Metrological performance for the detection of flammable gases
52
12.6 Scope of use........................................................................................................ 53
12.7 Functional safety ............................................................................................... 53
12.8 Reliability data .................................................................................................... 54
12.9 Special conditions of use ............................................................................... 54

13 Appendix | Ordering information ............................................ 55

13.1 Gas List ................................................................................................................... 55

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1 Presentation

1.1 Purpose
This range of sensors is designed to detect a particular gas depending on the type of sensor used.

1.2 Operating principle

The measurement sensor converts the target gas into voltage or current. This electrical parameter
is:
• Either conducted directly via a connecting cable to a dedicated central measurement unit
(as with the OLC 100 explosimeter) that operates on the principle of the Wheatstone
bridge. Such a measurement unit is available in the TELEDYNE OLDHAM SIMTRONICS
range.
• Or amplified, corrected for temperature, linearised, and converted to a 4-20 ma signal
(as for the OLCT 100) and conducted via a connecting cable to a centralized unit
(measurement unit or industrial automation system).

1.3 Composition of the detector

A detector comprises the following elements:
Id. Description
1. Company label
2. Cover
3. PCB protector (for OLCT version).
4. PCB.
5. Cable gland inlet. (cable gland not supplied).
6. Enclosure.
7. Sensor block.
8. Nozzle.
9. Ground connection.
10. LEL sensor (high temperature).

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Figure 1 : component parts of an OLCT 100 detector

1.4 Internal elements

The following elements are internally accessible to the user:
Id. Description
1. Terminal for the cable being connected to the controller (measurement unit, automation).
2. Sensor block connector.
3. Calibration ribbon connector.
4. 4 mA adjustment.
5. Push button access for 4 mA adjustment.
6. Zeroing.
7. Sensitivity adjustment.

OLC 100 detector OLCT 100 explosimeter OLCT 100 detector for toxic gases

Figure 2 : internal view of the detectors

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1.5 Identifiers
The enclosure has two identifier labels, as described below:

1.5.1 Company label

This in turn groups the detector features together:
Id. Description
1. Manufacturer's name
2. Name of product
3. ATEX Marking
4. CE symbol and the number of the organisation that
provided the TELEDYNE OLDHAM SIMTRONICS
production quality certification (INERIS )
Figure 3 : Firmplate (example)
5. Warning
6. Type of gas detected and range of measurement
7. Temperature range for which the detector is certified for
use in explosive areas (excluding metrological
performance)
8. Symbol of Marine Certification and number of the
Approval Agency that issued the certificate
9. Recycling symbol
10. Additional markings ATEX, IECEX, INMETRO, etc and
numbers of certificates

1.5.2 Side label

This label shows the following :
Id. Description
1. Thread diameter and pitch for cable inlet 1
2
2. Detector reference number, less sensor (P/N) 3

3. Detector serial number (S/N) Figure 4 : side label

The first two digits (in this case 09) correspond to the year of
manufacture (in this case 2009)

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2 Ranges

2.1 OLC 100 and OLCT 100 ranges

The OLC 100 range is reserved for the detection of explosive vapor by using a Wheatstone
bridge sensor.
The OLCT 100 range of detectors is provided with an amplifier producing a 2 or 3 wire 4-20
mA analog output. These are transmitter detectors and, therefore, the letter "T".
OLC 100 OLCT 100 XP OLCT 100 OLCT 100 IS OLCT 100 HT
XPIR
Explosion Intrinsically Explosionproof
Features Explosionproof Explosionproof
proof safe (1) (2)

Catalytic Catalytic
Detection of sensor
Catalytic sensor (VQ1 or
explosive
sensor (VQ1) AP 4F) or semi- high
gases
conductor temperature

Detection of EC
Infrared sensor EC
toxic gases Or SC
Detection of
EC EC
oxygen
Detection of
Infrared sensor
CO2
2 wires for EC
4-20 mA
(3) 3 wires for SC 3 wires 2 wires 3 wires
output
3 wires for LEL
(1) Requires the use of a Zener barrier
(2) Sensor can be remote up to 5, 10, or 15 meters using a high temperature cable
(3) mV bridge output, 3 wires
EC : Electrochemical sensor
SC : Semi-conductor sensor.
LEL : Catalytic bead
AP : Poison resistant
Table 1 : comparison of OLC 100 and OLCT 100 series detectors

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3 Installation

It is recommended that the guides relating to the installation, use, and maintenance of
flammable gas and oxygen detectors (standard EN/IEC 60079-29-2) and toxic gas
detectors (standard EN 45544-4) should be clearly understood.

Installation shall be in accordance with the standards in force, classification of the zone,
and in conformity with standards EN/IEC 60079-14 and EN/IEC 61241-14, the
editions in force, or with other national and/or local standards.

3.1 Regulations and conditions of use

• The installation should meet all the regulations currently in force for installations in
explosive atmospheres, in particular the standards IEC/EN 60079-14 and IEC/EN
60079-17 (whichever editions are in force) or in accordance with other national
standards.
• Generally speaking, the ambient temperature, supply voltage, and power that are
mentioned in this document relate to explosion safety. This has nothing to do with the
operating temperatures of the detector.
• The equipment is allowed in zones 0, 1, 2, 20, 21 and 22 for ambient temperatures
ranging from -40 ° C to + 70 °.
• The detector sensor in the transmitter should always be in contact with the ambient air.
Therefore:
- Do not cover the detector.
- Do not paint the detector.
- Avoid dust.

3.2 Necessary equipment

• Complete detector assembly
• Requisite connector cable
• Multimeter (intrinsically safe, if necessary)
• Tools
• Fixing hardware

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3.3 Electrical power supply

Type of detector Supply (V DC) Maximum current Power consumed
(mA) (mW)
OLCT 100 XP HT 15,5 to 32 110 1705
OLCT 100 XP LEL 15,5 to 32 100 1550
OLCT 100 XPIR 15,5 to 32 80 930
OLCT 100 XP EC 11 to 32 23,5 260
OLCT 100 IS EC 11 to 32 23,5 260
OLCT 100 XP SC 15,5 to 32 100 1550
By TELEDYNE OLDHAM
OLC 100 (VQ1) 340 (1)
SIMTRONICS controller
By TELEDYNE OLDHAM
OLC 100 (4F) 370 (1)
SIMTRONICS controller

(1) Depends on the gas controller

3.4 Location of the detector

Depending on the density of the gas to be detected or the application, the detector shall be
positioned at the ground level, or on the ceiling at the same height as the airflow, or near to the
air extraction ducts. Heavy gases may be detected at the ground level, while light gases will be
found at ceiling height. Gas densities are provided on page 28.

3.5 Detector positioning

The detector shall be installed with the detector sensor pointing downwards.
Any tilt of more than 45° from the vertical will lead to an inaccurate measurement.

Figure 5 : sensor pointing downwards and maximum tilt angle

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Installation of the enclosure shall be secured with 4 x M6 screws and the appropriate plugs for
the supporting material

Figure 6 : fixing template for the enclosure

A special holder is available for mounting the detector on the ceiling (see section on accessories.
In the OLCT 100 HT version, only the removable detector head can be used at temperatures from
-20°C to + 200°C. The OLCT 100 HT enclosure can only be used in ambient temperatures from
-40°C to + 70°C. The high temperature cable between the OLCT 100 HT enclosure and the
head is integral with the instrument and is not user-replaceable.
The cable should be protected mechanically

3.6 Connector cable

The detector shall be connected to the controller (measurement and automation unit) by a
shielded instrumentation cable, armoured when necessary. The choice of cable will be dictated
by the particular requirements of the installation, distance, and type of detector (see table below).

Detector

Central unit

Connector cable

Figure 7: the cable connecting the detector to the controller should be chosen with care

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Type of detector Type of sensor Maximum length (km) for cable Maximum load
of cross-section as indicated resistance for 4-
20 Ma
0,5 mm² 0,9 mm² 1,5 mm²
Upstream line voltage 24 24 24
(Vcc)
OLCT 100 XP Catalytic or 0,8 1,4 2,4 250
semiconductor
OLCT 100 XP (1) Electrochemical <4 <4 <4
OLCT 100 XPIR Infra-red 1,4 2,6 4,4 250
OLCT 100 IS (2) Electrochemical 1,8 3,3 <4
OLCT 100 HT Catalytic, high 0,8 1,4 2,4 250
temperature

(1) for resistance calculations, the assumed load is 120 Ω for 4-20 Ma.
(2) for resistance calculations, the assumed load is 120 Ω for 4-20 Ma, and a 300  Zener
blocking diode.
Warning: all wiring should meet the installation standards and should be described in a system
document for SI installations.

The cable must have a braided screen to reduce the influence of electrical and radio-frequency
interference. A cable such as AFNOR M 87-202 01-IT-09-EG-FA (Nexans) may be used. It shall
be selected according to the type of detector and in accordance with the table shown
hereinabove. Below are further examples of suitable cables:
Non ATEX zone: CNOMO FRN05 VC4V5-F
ATEX zone: GEUELYON (U 1000RHC1)
ATEX zone: GVCSTV RH (U 1000)
ATEX zone: xx-xx-09/15- EG-SF or EG-FA or EG-PF (U 300 compatible with M87202)

The maximum permissible length will depend on the cross-section of the cable conductors (see
table) and on the minimum supply voltage.

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3.7 Cable connection

3.7.1 Switch off line power supply

On the controller:
1. Inhibit any installation alarms to avoid unexpected triggering during operation.
2. In accordance with the manufacturer’s instructions, switch off the power to the module in order
to be connected to the detector.

3.7.2 Cable preparation

The cable shall be taken from the controller (measurement and automation) to the point of
measurement (see Figure 8). The passage, support, and protection of the cable shall be
according to best practice.

3.7.3 Cable entry

The detector is supplied without cable gland.

It is essential that the instructions provided by the manufacturer of the compression

gland are followed and the braided screen is correctly connected. M20x1.5 flamme
proof certified cable gland shall be used (see Chapter 11).

1 - Remove the gasket and the two metal washers

(Rep A) supplied with the detector.

2 - Arrange the cable as shown in the picture.

3 - Spread the braided shield as shown in the

picture.
Avoid creating "pigtails" with the braided shield.

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4 - Insert the part back into the OLC/OLCT100

and then mount the cable gland (not supplied).

3.7.4 Ca b le c o n n e c tio n

The connection of the cable between the detector and controller should be made with
the power off. The site should be at equal potential

Connect the cable to the detector side before connecting the controller side.
After the wiring has been completed, connect the cable screen to the ground terminal of the
controller.

Figure 8: connection for a 2-wire 4-20 Ma detector

Figure 9: connection for an intrinsically safe, 2-wire 4-20 Ma detector with a Zener diode

Figure 10: connection for a 3-wire 4-20 Ma detector

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Figure 11: connection for a 3-wire OLC 100 type detector

3.7.5 Connecting the enclosure to ground

Connect the enclosure ground terminal to earth according to the regulations. This ground
connection may, however, be taken from the terminal on the screw fixing the PCB to the inside of
the housing.

Figure 12 : Ground connection terminal

3.7.6 Closing the cover

Before connecting the cable to the terminal on the controller, it is essential that the cover is
completely closed.

In order to lock the cover by rotation, unscrew the blocking screw until into contact
with the cover.

If you were to remove the cover, tighten the blocking screw before unscrewing the
cover.

Cover blocking
screw

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4 Calibration

The tasks described in this chapter are reserved for authorised trained personnel
only, since these tasks are liable to affect detection reliability

This procedure describes:

• Zero adjustment;
• Sensitivity adjustment.

4.1 Necessary equipment

• Multimeter (ranges 0-30 mA and 0-2 V), intrinsically safe if necessary.
• Cylinder of pure air.
• Cylinder of calibration gas, of suitable concentration for the measurement range
(between 30 and 70% of the measurement range).

4.2 Commissioning

4.2.1 Prior checks

Check the following points:
• Detector housing grounded.
• Connexion of the shielding of the cable and the ground to the controller
• Integrity of the mechanical mounting (fixings, cable gland, and cover) ensured.

Powering up detector
1.Inhibit any installation alarms to avoid unexpected triggering during the operation.
2. Connect power to the detector line in accordance with the manufacturer's instructions.

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4.3 Stabilization time

After mounting, it is essential to allow the detector temperature to stabilize. In addition, after
turning the power on, certain sensors require a further pre-heating time. Any adjustment before
the time indicated will result in an incorrect measurement, which may in turn compromise the safety
of the goods and personnel. The total waiting time is summarised below:
• Explosimeter: 2 hours
• Oxygen detector: 1 hour (2 year sensor) to 1.5 hour (5 year sensor)
• Electrochemical detector: 1 hour, excluding:
- NO (nitrogen monoxide): 12 hours
- HCl (hydrogen chloride): 24 hours
- ETO (ethylene oxide): 36 hours
- CH2O (formaldehyde): 36 hours
• Semiconductor sensor: 4 hours
• Infra-red detector: 2 hour

4.4 Calibrating the OLC 100

The cover of the detector remains closed, with any adjustments being carried out at
the central measuring unit.
For an explosimeter, it is recommended that the detector should be calibrated by
using the gas to be detected. If the user would like to calibrate the detector with a
gas other than that detected and programmed in the factory, reference should be
made to the table on page 30 by using the recommended gas and corresponding
coefficient.

4.4.1 Zeroing
Proceed as follows :

Figure 13 : Zeroing (OLC 100)

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1. Inhibit any alarm signals on the controller.

2.Place the calibration cup onto the detector head (

Figure 13, "A").

3. Connect the calibrator cup to the pure air cylinder "D" using a flexible hose "B".
4. Open the valve on the zero air cylinder (flow rate 30 to 60 litres/h) "C".
5. After the measurement has stabilised (approx. 2 minutes), read the display of the central
measuring unit.
A displayed figure of "0.0" corresponds to 0% gas.
6. If a different value is displayed, adjust the "0" on the measuring unit to correct the value until
a reading of exactly 0.0% is obtained.
7. Close the valve "C" on the cylinder. Remove the calibration cup "A" if no sensitivity control is
necessary.
8. Reset any alarm signals on the controller.

4.4.2 Adjustment of gas sensitivity

This procedure takes place after the zeroing stage:
1. Inhibit any alarm signals on the controller.
2. Place the calibration cup on the detector head (

Figure 13, "A").

3. Connect the calibration cup to the calibration gas cylinder "D" by using a flexible hose "B".
4. Open the valve on the calibration gas cylinder "C" (flow rate 30 to 60 litres/hr).
5. After the measurement has stabilized (approx. 2 minutes), read the display of the central
measuring unit.
6. Adjust "S" on the measuring unit in order to display the desired value.
7. Close valve "C" on the cylinder and remove the calibration cup "A".
8 . Walt for the measured signal to return to zero and reset the alarm signals on the controller.

4.5 Calibrating the OLCT 100

Wait for the stabilization time on power-up.
For a LEL detector, it is recommended to calibrate with the targeted gas. Should the
operator calibrate with another gas, please refer to tables on pages 28 to 30 to
know the recommended calibration gas and the cross sensitivity factor.

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4.5.1 Zeroing (OLCT 100)

Proceed as follows:

Figure 14: Zeroing and Sensitivity adjustment (OLCT 100)

Inhibit any alarm signals on the controller.

2. Insert the blue and green plugs on the measurement lead into the + and - multimeter sockets,
respectively (Figure 14, "H")
3. Insert the measurement lead plug into connector "A".
4. Place the calibration cup on the detector head ("D").
5. Connect the calibration cup to the pure air cylinder "G" by using a flexible hose "E".
6. Open the valve "F" on the pure air cylinder (flow rate 30 to 60 litres/h).
7. After the measurement has stabilized (approx. 2 minutes), read the value on the multimeter
"B".
A measurement of 0.4 V corresponds to 4 mA, i.e. 0% gas.
Note: for the oxygen detector, inject pure nitrogen instead of air.
8. If a different value is displayed, adjust the "0" control ("C") in order to correct the value until
0.4 V is exactly displayed.
9. Close the valve "F" on the cylinder. Remove calibration ribbon cable "A", calibration pipe "D",
and close the detector again if no sensitivity control is necessary.
10. Reset any alarm signals on the controller.

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4.5.2 Sensitivity adjustment (OLCT 100)

This procedure enables the measurement to be adjusted corresponding to x% gas. Proceed as
follows

1. Inhibit any alarm signals on the controller.

2. Insert the blue and green plugs on the measurement lead into the + and - multimeter sockets,
respectively (Figure 14Figure 14: Zeroing and Sensitivity adjustment (OLCT 100), "H").
3. Insert the measurement lead into connector "A".
4. Place the calibration cup on the detector head ("D").
5. Connect the calibration cup to the calibration gas cylinder "G" by using a flexible hose "E".
A stainless steel pressure gauge and Teflon tube must be used for toxic gases and Freons.
Note: for an oxygen detector, use a cylinder of pure air or roughly 19% oxygen.
6. Open the valve "F" on the calibration gas cylinder (flow rate 30 to 60 litres/h).
7. Once the measurement has stabilized (approx. 2 minutes), read the value on the multimeter.
Use the following formula to determine the voltage value that is to be displayed:
1600 𝑥𝑥 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐 𝑔𝑔𝑔𝑔𝑔𝑔 𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐𝑐
Voltage displayed (mV) = 400 + 𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑𝑑 𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟𝑟

For example, for a range of 1000 ppm CO with a calibration gas cylinder of 300 ppm, the
voltage displayed will be:
1600 𝑥𝑥 300
Voltage displayed (mV) = 400 + 1000
= 880 mV
8. If a different value is displayed, adjust the "S" control ("C") to correct the value until an exact
value of the calibration gas is displayed.
9. Close the valve "F" on the cylinder. Remove measurement cable "A", calibrate cup "D", and
close the detector again.
10. Wait for the measured signal to return to zero and reset the alarm signals on the controller.

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Calibration coefficients of explosive gases for catalytic detectors

When a VQ1 type sensor is used (available for OLC 100 and OLCT 100), the coefficients are
as follows:

Gas Chemical LEL LSE Flash Vapor Coefficient- Coefficient- Coefficient - Coefficient -
Formula (%) (%) point density Calibration gas Calibration gas Calibration gas Calibration
(°C) CH4 (methane) H2 C4H10 gas
(Hydrogen) (Butane) C5H12
(Pentane)

Ethyl acetate C4H8O2 2.10 11.50 -4 3.0 1.65 0.90 0.80

Acetone C3H6O 2.15 13.00 -18 2.1 1.65 0.90 0.80

Acetylene C2H2 2.30 100 -18 0.9 2.35 1.90 1.25 1.15

Acrylic acid C3H4O2 2.40 8.00 54 2.5 5.00 2.65 2.40

Butyl acrylate C7H12O2 1.20 8.00 37 4.4 3.50 1.85 1.70

Ethyl acrylate C5H8O2 1.70 13.00 -2 3.5 3.05 1.65 1.50

Acrylonitrile C3H3N 2.80 28.00 -1 1.8 1.45 1.20 0.80 0.70

Ammoniac NH3 15.00 30.20 < -100 0.6 0.90 0.75 0.50 0.45

Benzene C6H6 1.20 8.00 -11 2.7 4.00 2.15 1.90

1.3-
C4H6 1.40 16.30 -85 1.9 2.55 1.35 1.25
Butadiene

Butane C4H10 1.50 8.50 -60 2.0 1.90 1.00 0.90

Butanol
C4H10O 1.4 11.3 29 2.6 1.95 1.05 0.95
(Butyl Alcool)

2 - Butanone
C4H8O 1.80 11.50 -4 2.5 3.90 2.10 1.90
(MEK)

Cyclohexane C6H12 1.20 8.30 -17 2.9 2.00 1.10 1.00

Dimethylether C2H6O 3.00 27.00 -41 1.6 1.80 0.95 0.90

Dodecane C12H26 0.60 ~6.0 74 5.9 4.00 2.15 1.90

Ethane C2H6 3.00 15.50 135 1.0 1.50 0.80 0.75

Ethanol C2H6O 3.30 19.00 13 1.6 2.15 1.75 1.15 1.05

Ether
(C2H5)2O 1.70 36.00 -45 2.6 1.90 1.00 0.90
(Diethylether)

Ethylene C2H4 2.70 34.00 - 135 1.0 1.65 1.35 0.90 0.80

LPG Prop+But 1.65 ~9.0 < -50 1.9 1.90 1.00 0.90

Diesel Melange 0.60 ~6.0 55 >4 3.20 1.70 1.55

Natural Gas CH4 5.00 15.00 -188 0.6 1.05

HFO-1234yf 6.2 12.3 1.35 0.75

Heptane C7H16 1.10 6.70 -4 3.5 2.20 1.20 1.05

Hexane C6H14 1.20 7.40 -23 3.0 2.10 1.15 1.00

Hydrogen H2 4.00 75.60 - 0.069 1.00

Isobutane C4H10 1.50 8.40 -83 2.0 1.50 0.80 0.75

Isobutene C4H8 1.60 10.00 <-10 1.9 2.20 1.20 1.05

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Gas Chemical LEL LSE Flash Vapor Coefficient- Coefficient- Coefficient - Coefficient -
Formula (%) (%) point density Calibration gas Calibration gas Calibration gas Calibration
(°C) CH4 (methane) H2 C4H10 gas
(Hydrogen) (Butane) C5H12
(Pentane)

Isopropanol C3H8O 2.15 13.50 11.7 2.1 1.60 0.85 0.80

Kerosene
C10 - C16 0.70 5.00 > 50 >4 5.00 2.65 2.40
(JP4)

Methyl
C5H8O2 2.10 12.50 2 3.5 2.25 1.20 1.10
Methacrylate

Methane CH4 5.00 15.00 -188 0.55 1.00

Methanol CH3OH 5.50 44.00 11 1.1 1.40 1.15 0.75 0.70

melange
Naphta 0.90 5.90 > 44 >4 3.50 1.85 1.70
(Mixture)

Nonane C9H20 0.70 5.60 31 4.4 4.40 2.35 2.10

Octane C8H18 1.00 6.00 12 3.9 2.70 1.45 1.30

Ethylene
C2H4O 2.60 100 -20 1.5 2.10 1.70 1.15 1.00
Oxyde

Propylene
C3H6O 1.90 37.00 70 2.0 2.35 1.90 1.25 1.15
oxide

Pentane C5H12 1.40 8.00 -49 2.5 2.10 1.15 1.00

Propane C3H8 2.00 9.5 -104 1.6 1.55 0.85 0.75

Propylene C3H6 2.00 11.70 -107.8 1.5 1.65 0.90 0.80

Styrene C8H8 1.1 8.00 31 3.6 6.30 3.35 3.00

Gasoline
/ 1.10 ~6.0 21 3à4 1.80 0.95 0.90
lead free

Toluene C7H8 1.20 7 5 3.1 4.00 2.15 1.90

Turpentine
- 0.8 6.0 35 4.7 3.50 1.85 1.70
Oil

Triethyl
C6H15N 1.20 8 -15 3.5 2.05 1.10 1.00
amine

melange
White Spirit 1.10 6.50 >30 >4 3.50 1.85 1.70
(Mixture)

Xylene C8H10 1.00 7.60 25 3.7 4.00 2.15 1.90

Cells with a grey background: gases recommended for calibrating the detector

Table 2 : Calibration coefficients of explosive gases for catalytic detectors (VQ1)

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When an anti-poison 4F type sensor is used (only available for OLCT 100), the coefficients are
as follows:

Gas Chemical LEL % LSE Vapor CH4 Coef C 5 H 12 Coef H 2 Coef

Formula % density

Acetone C3 H6 O 2.15 13.0 2.1 2.24 1.03 1.1

Acetylene C2 H2 2.3 100 0.9 1.91 0.7

Ammoniac NH3 15.0 30.2 0.6 0.79 0.36

Benzene C6H6 1.2 8.0 2.7 2.45 1.13

n-Butane C4H10 1.5 8.5 2.0 2.16 0.99

Ethane C2H6 3.0 15.5 1.0 1.47 0.78

Ethanol C2H6O 3.3 19.0 1.6 1.37 0.63

Ethylene C2H4 2.7 34.0 1.0 1.41 0.65

n-Hexane C6H14 1.2 7.4 3.0 2.85 1.14

Hydrogen H2 4.0 75.6 0.07 1.0

Isopropanol C3H8O 2.15 13.5 2.1 1.84 0.85

JP-4 3.28 1.51

JP-5 3.33 1.53

JP-8 3.48 1.6

Methane CH4 5.0 15.0 0.55 1.0

Methanol CH3OH 5.5 44.0 1.1 1.27 0.58

n-Pentane C5H12 1.4 8.0 2.5 2.17 1.0

Propane C3H8 2.0 9.5 1.6 1.9 0.87

Styrene C8H8 1.1 8.0 3.6 2.13 0.98

Toluene C7H8 1.2 7.0 3.1 2.26 1.04

Xylene C8H10 1.0 7.6 3.7 2.8 1.29

Cells with a grey background: gases recommended for calibrating the detector
Table 3 : Calibration coefficients of explosive gases for catalytic detectors with a 4F sensor.

Example
Calibration of an "acetone" detector (VQ1) with a calibration gas of 1% volume butane

Value to be displayed:
1% (𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖𝑖 𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏)
1.5% (𝐿𝐿𝐿𝐿𝐿𝐿 𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏𝑏)
x 100 x 0.90 (butane/acetone coefficient) = 60 % LEL

Note:
• LEL values vary according to the source.
• Coefficients are accurate to ± 15%.

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5 Preventive maintenance

Periodic checks enable the equipment and installation to remain in conformity and ensure reliable
detection. This chapter describes what preventative action should be taken and at what intervals.
Inspection and maintenance are carried out in accordance with standards in force EN60079-17
or IEC 60079-17, with whatever editions are in force or with other national standards.

5.1 Frequency of maintenance

Gas detectors are safety devices. TELEDYNE OLDHAM SIMTRONICS recommends the regular
testing of fixed gas detection installations. This type of test consists of injecting the calibration gas
into the detector at a sufficient concentration to activate the pre-set alarms. It is to be understood
that this test is in no way a replacement for a detector calibration.

The frequency of gas tests depends on the industrial application where the detector is in use.
Frequent inspections should be made in the months following the commissioning of the installation,
and should then become more widely spaced provided that no significant deviation is observed.
If a detector should fail to react in contact with the gas, calibration is essential. The frequency of
calibrations shall be appropriate according to the results of the tests (humidity, temperature, dust,
etc.); however, it must not exceed one year.
The general manager should put safety procedures in place on-site. TELEDYNE OLDHAM
SIMTRONICS cannot be held responsible for their enforcement.

To attain SIL capability level 1 in accordance with European standard EN 50402,

Requirements relating to the safety operation of fixed gas detection systems, the
maintenance interval for explosive gas detectors must be no more than 6 months.
To obtain SIL capability level 2, the maintenance interval must be no more than 3
months

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5.2 Actions

Periodic maintenance comprises the following actions:

• Removal of dust from the sensor’s protective housing, using only a dry cloth. No water or
solvents should be used. Severely dusty heads or sensors should be replaced immediately.
• For use in dusty explosive atmospheres, the user should undertake full and regular
cleaning to avoid the build-up of dust. The maximum permissible thickness of a dust layer
must be less than 5 millimeters.
• Replacement of screws: if the screws on the fire-proof part “d” of the body need to be
replaced, screws of equal quality A4. should be used.
• Zero inspection with pure air.
Gas sensitivity inspection and possible adjustment, as per 0

• Calibration

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6 Maintenance

Maintenance primarily comprises changing any sensors that no longer meet their initial
metrological characteristics.

Since they are liable to affect detection reliability, the tasks described in this
chapter are reserved for authorized trained personnel only.
Inspection and maintenance shall be carried out in accordance with standards
EN60079-17 or IEC 60079-17, with whatever editions are in force or with other
national standards.
The 4 mA level is factory-set. This value cannot be changed or adjusted. This
check does not concern explosimeter OLC 100.

6.1 Opening the cover

This stage is necessary for the 4 mA check, zeroing, and calibration of the detector. Unscrew the
lid of the enclosure by using a tool positioned like a cross.

. All the necessary steps should be taken before opening the lid of the enclosure
if it is installed in an ATEX zone, in particular:
• A fire permit from the appropriate department.
• Continuous use of a portable explosimeter.
• Use of an intrinsically safe multimeter.
• Reduction to an absolute minimum of the time involved.
This observation does not concern intrinsically safe versions that are used in an
ATEX gas zone (see Specific instructions for use in explosive atmospheres and
operational safety).

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6.2 Checking the current generator

Although this setting is made in the factory, it is possible that the transmitter and controller may
have to be matched. In this case, proceed as follows

Figure 15: checking the current generator

1. Insert the blue and green plugs on the measurement lead into the + and – multimeter sockets,
respectively.
2. Insert the measurement lead plug into connector "A".
3. Use a small screwdriver to press the 4 mA adjust button "D".
The instrument then sends a 4 mA signal down the line. The multimeter displays 400 mV.
4. On the controller (measurement and automation), check that the measurement displayed
corresponds to 0% of the measurement scale.
5. If some different value is displayed, keep pressing the button and adjust P1 ("C").
6. Release the push-button "D". Remove the measurement lead when adjustment is complete.

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6.3 Possible errors

The table below summarizes the various possible detector errors:

OLC 100 explosimeter

Observed fault Possible cause Action
Zero setting not possible Sensor Replace the sensor
Cable Check cable
Main unit detector module Check module
Sensitivity adjustment not Sensor Replace the sensor
possible Connector cable Check cable
Inappropriate calibration gas Check calibration gas
concentration
High gas concentration Maladjustment Zero and span the detector
indication

OLCT 100 Detector

Observed fault Possible cause Action
Line current 0 mA Connector cable Check cable
Power supply Check voltage
PCB Replace the PCB
Line current < 1mA Power the detector down then
power it up (Off/On)
Sensor Replace the sensor
PCB Replace the PCB
Line resistance too high Check cable
Power supply
Check voltage
Analog output is frozen at Gas concentration has Proceed a power cycle
20 mA reached 100% LEL (Off/On)
Zero and span the detector
Courant de ligne >23mA Over Range Adjust zero and sensitivity
settings
Replace the sensor
Zero setting not possible Sensor Replace the sensor
PCB Replace the PCB
Sensitivity adjustment not Sensor Replace the sensor
possible PCB Replace the PCB
High gas concentration Maladjustment Adjust zero and sensitivity
indication settings

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6.4 Replacing sensor block

6.4.1 Standard Version
First follow the instructions in the section Opening the cover

The sensor block encloses the actual detector sensor

itself. A sensor block can only be associated with a
defined detector. A guide pin ensures that the sensor
block goes together correctly
Figure 16: The sensor block (the black component)

(a) Blocking screw

Follow the procedure below :
• Inhibit any alarm signals on the controller.
• Switch off the supply to the detector.
• For a catalytic sensor, first remove the PCB connector.
• Loosen the locking screw (a) on the detector head and unscrew the head.
• Withdraw the (catalytic) detector head or the defective sensor block (OLCT 100).
• Replace the worn-out sensor with an identical part.
• Screw the detector head back on again and tighten the locking screws.
• Re-establish the supply to the detector from the controller.
Adjust the settings for the new detector (see

• Calibration p 13).
• Close the detector cover.
• Reset any alarm signals on the controller.

6.4.2 High temperature version

Proceed as follows for the high temperature version.
• Inhibit any alarm signals on the controller.
• Switch off the supply to the detector.
• Loosen the maintenance screw (Figure 17, "B") on the detector head cover and remove
it.
• Replace the defective detector head and replace the maintenance screw "B" on the
detector head cover. Disconnect the high temperature cable from terminal block "A" on
the detector head. Connect the high temperature cable to terminal block "A".

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Figure 17 : OLCT 100 HT – elements specific to changing the high temperature sensor

• Screw the detector head back on again and tighten the locking screws.
• Re-establish the supply to the detector from the controller.
• Adjust the settings for the new detector (see chapter 0

• Calibration p 13)
• Close the detector cover.
• Reset any alarm signals on the controller.

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7 Accessories

Accessory Utilization Illustration Reference

Tools kit Tool kit for OLCT 100 including 6147879
calibration cup, Allen key, sensor
removal key and connector cable
humidifier kit Used for the calibration of the semi- 6335918
conductor transmitters

Calibration Facilitates the injection of calibration 6331141

cup gas on the sensor Plastic material.
Effect on measurement: measurement Risk of
similar to that for natural diffusion electrostatic
Effect on response time: none charges. Wipe
with a damp
cloth
PTFE remote Enables measurement in bypass 6327910
sampling cup mode Plastic material.
Effect on measurement: no effect if Risk of
calibration is carried out under the electrostatic
same conditions (cup, flow rate) charges. Wipe
with a damp
Effect on response time: none
cloth
Splash-guard Protects the detector against splashes 6329004
kit Effect on measurement: no effect. Plastic material.
Risk of
Effect on response time: response
electrostatic
time for natural diffusion can
charges. Wipe
increase for certain gases. Contact us
with a damp
for details.
cloth
Stainless steel Protects the detector against splashes 6129010
Splash-guard Effect on measurement: no effect.
kit
Effect on response time: response
time for natural diffusion can
increase for certain gases. Contact us
for details.

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Accessory Utilization Illustration Reference

Remote Enables the detection of ambient 6327911
calibration gases simultaneously with a Plastic material.
cup calibration gas injection pipe. Risk of
Effect on measurement: no effect. electrostatic
charges. Wipe
Effect on response time: negligible.
with a damp
cloth
PTFE water Protects the gas inlet from dust and 6335975
barrier splashing Plastic material.
Effect on measurement: no effect, but Risk of
cannot be used for detecting O3, electrostatic
HCl, HF, or CL2. charges. Wipe
with a damp
Effect on response time: response
time increased (contact us for heavy cloth
gases of a density greater than 3 and
at low concentrations < 10 ppm
Universal Enables the measurement of a gas 6793322
Pitot tube passing through a sheath
Requires the use of the gas
circulation head
Effect on measurement: no effect.
Effect on response time: negligible.
Mounting kit Enables a detector to be fixed to the 6322420
ceiling.
Effect on measurement: no effect.
Effect on response time: no effect.
Sunshield Protects any detector mounted on the 6123716
outside of a building.
Effect on measurement: no effect.
Effect on response time: negligible.
Wall Allows the sensor to detect more 6331169
mounting gas quickly the gas. (Wall mounting)
collector Effect on measurement: no effect.
Effect on response time: response time
can increase up to 10%.

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Accessory Utilization Illustration Reference

Ceiling gas Allows the sensor to detect more 6331168
collector quickly the gas. (Ceiling)
Effect on measurement: no effect.
Effect on response time: response time
can increase up to 10%.

Replacement Enables replacement of an existing 6793718

adaptater kit detector without having to re-drill
holes.

Duct B301372
Mounting kit

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7.1 Cable gland

Purpose Reference
M20 cable gland for non-armoured cable 6343493
Material: stainless steel
M20 cable gland for non-armoured cable 6343499
Material: Nickel-plated brass (not recommended for use with ammonia
or acetylene)
M20 cable gland for armoured cable 6343489
Material: stainless steel
M20 cable gland for armoured cable. 6343495
Material: Nickel-plated brass (not recommended for use with ammonia
or acetylene)

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8 Spare parts

List of spares for the various detectors

Part Number Description

Catalytic sensor 0-100% LEL VQ1 for OLC 100 and OLCT 100 (Standard
6 314 010
version only)
Catalytic sensor 0-100% LEL 4F for OLCT 100 (poison resistant version only.
6 313 994
Not compatible with standard version)
6 314 220 Infrared sensor 0-100% LEL R1234yf for OLCT 100
6 314 221 Infra-red sensor 0-2000 ppm R1234yf for OLCT 100
6 314 222 Infrared sensor 0-2000 ppm R134a for OLCT 100
6 314 223 Infrared sensor 0-2000 ppm R407f for OLCT 100
6 314 224 Infrared sensor 0-2000 ppm SF6 for OLCT 100
6 314 259 Infrared sensor 0-2000 ppm R32 for OLCT 100
6 314 260 Infrared sensor 0-2000 ppm R1234ze for OLCT 100
6 314 261 Infrared sensor 0-5000 ppm R1233zd for OLCT 100
6 314 142 Infrared sensor 0-5000 ppm CO2 for OLCT 100
6 314 043 Infra-red sensor 0-5% vol. CO2 for OLCT 100
6 314 109 Infrared sensor 0-10% vol CO2 for OLCT 100
6 314 145 Infrared sensor 0-100% vol CO2 for OLCT 100
6 314 016 Electrochemical sensor 0-30% O2 for OLCT 100 XP (life expectancy 2 years)
6 314 205 Electrochemical sensor 0-30% O2 for OLCT 100 IS (life expectancy 2 years)
6 314 C5A Electrochemical sensor 0-30% O2 for OLCT 100 (life expectancy 5 years)
Electrochemical sensor 0-100 ppm, 0-300 ppm and 0-1000 ppm CO for
6 314 017
OLCT 100
6 314 018 Electrochemical sensor 0-30.0 ppm, 0-100 ppm H2S for OLCT 100
6 314 019 Electrochemical sensor 0-1000 ppm H2S for OLCT 100
6 314 125 Electrochemical sensor 0-5000 ppm H2S for OLCT 100
Electrochemical sensor 0-100 ppm, 0-300 ppm and 0-1000 ppm NO for
6 314 020
OLCT 100
6 314 021 Electrochemical sensor 0-10.0 ppm and 0-30.0 ppm NO2 for OLCT 100

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Part Number Description

Electrochemical sensor 0-10.0 ppm, 0-30.0 ppm and 0-100 ppm SO2 for
6 314 022
OLCT 100
6 314 025 Electrochemical sensor 0-10.0 ppm Cl2 for OLCT 100
6 314 023 Electrochemical sensor 0-2000 ppm H2 for OLCT 100
6 314 026 Electrochemical sensor 0-30.0 ppm, 0-100 ppm HCl for OLCT 100
6 314 028 Electrochemical sensor 0-10.0 ppm and 0-30.0 ppm HCN for OLCT 100
6 314 029 Electrochemical sensor 0-100 ppm NH3 for OLCT 100
6 314 030 Electrochemical sensor 0-300 and 0-1000 ppm NH3 for OLCT 100
6 314 031 Electrochemical sensor 0-5000 ppm NH3 for OLCT 100
6 314 033 Electrochemical sensor 0-1.00 ppm PH3 for OLCT 100
6 314 035 Electrochemical sensor 0-3.00 ppm ClO2 for OLCT 100
6 314 024 Electrochemical sensor 0-30.0 ppm ETO for OLCT 100
6 314 032 Electrochemical sensor 0-1.00 ppm AsH3 for OLCT 100
6 314 027 Electrochemical sensor 0-50.0 ppm SiH4 for OLCT 100
6 314 034 Electrochemical sensor 0-1.00 ppm COCl2 for OLCT 100
6 314 036 Semiconductor sensor for methyl and methylene chloride for OLCT 100
6 314 037 Semiconductor sensor for R12, R22, R123 and FX56 freons for OLCT 100
Semiconductor sensor for R134a, R11, R23, R143a, R404a, R507, R410a,
6 314 038
R32, R407c and R408a freons for OLCT 100
Semiconductor sensor for ethanol, toluene, isopropanol, 2-butanone and
6 314 039
xylene for OLCT 100
6 451 626 OLC 100 Board
6 451 646 OLCT 100 IR Board (CO2)
6 451 700 OLCT 100 IR Board (R1234yf, R134a, R407f and SF6)
6 451 621 OLCT 100 SC Board
6 451 594 OLCT 100 XP 0-100% LEL Board (standard version)
6 451 696 OLCT 100 XP 0-100% LEL Board (Poison resistant version)
6 451 623 OLCT 100 toxic Board IS or NO version
6 451 649 Usual EC OLCT 100 XP Board (CO, H2S, H2, NH3, DMS, ethylmercaptan)
6 451 648 OLCT 100 O2 Board (for OLCT 100 XP with 6314016 only)
6 451 681 OLCT 100 O2 Board (for OLCT 100 XP with 6314C5A only)

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9 Declarations of EU conformity

The document hereafter (2 pages) reproduces the EU declaration of conformity.

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The document below (1 page) reproduces the 2014/90/UE Marine Directive declaration of
conformity.

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10 Technical specifications

10.1 Dimensional characteristics

Figure 18: dimensional characteristics of the detectors

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10.2 General Specifications

Supply voltage at the • OLC 100 : 340 mA (current supply)
detector terminals (Vdc) :
• OLCT 100 XP HT : 15.5 V to 32 V
• OLCT 100 XP LEL : 15.5 V to 32 V
• OLCT 100 XP IR : 13.5 V to 32 V
• OLCT 100 XP EC : 11 V to 32 V
• OLCT 100 XP SC : 15.5 V to 32 V
Average consumption : • OLC 100 : 340 mA
• OLCT 100 XP HT : 100 mA
• OLCT 100 XP LEL : 110 mA
• OLCT 100 XP IR : 80 mA
• OLCT 100 XP EC : 23.5 mA
• OLCT 100 XP SC : 100 mA
Output current (signal) : • Current source encoded from 0 to 23 mA (non isolated)
• Linear 4 to 20 mA current reserved for measurement
• 0 mA: electronic fault or no power supply
• < 1 mA: fault
• 2 mA : initialization mode
• frozen to 20 mA : the concentration of combustible gas has
reached 100% LEL
Type of cable : • Explosimeter : screened, 3 active wires
• HT Explosimeter : screened, 3 active wires
• Electrochemical detector : screened, 2 active wires
• Infra-red detector : screened, 3 active wires
• Semiconductor detector : screened, 3 active wires
Cable inlet : M20x1.5 (cable gland not suppled) or ¾ NPT
Maximum diameter of cable 12 mm
entering the detector :
Electromagnetic Conforms to EN50270:06 (typ2)
compatibility :
Ingress Protection : IP66

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Approvals : Conforms to European Directive ATEX 2014/34/UE (see

attached Declaration) and to IEC Ex schedule for fire-proof
detectors
SIL 2 in accordance with EN50402:05 / EN61508:11
Performance approved according to EN 60079-29-1:16 (VQ1
catalytic bead)
Performance approved according to EN 50104:10 (oxygen
detectors)
Weight : • OLC 100 : 0.950 kg
• OLCT 100 XP HT : 1.8 kg
• OLCT 100 XP LEL : 1.0 kg
• OLCT 100 XP IR : 1.1 kg
• OLCT 100 XP EC : 1.1 kg
• OLCT 100 XP SC : 1.1 kg
Materials: Epoxy painted aluminum. 316 Stainless Steel in option

10.3 Catalytic sensor (OLCT 100 XP)

Common characteristics
Measurement range : 0 – 100% LEL
Measurement principle : catalytic
Accuracy : see table below
Temperature range : see table below
Relative humidity : 0 to 95% RH (non-condensing relative humidity)
Pressure : atmospheric ± 10%
Response time : T50 = 6 seconds. T90 = 15 seconds for Methane
Lifetime (typical) : 48 months
Storage conditions : -40 to 70°C, 20 to 60% RH, 1 bar ± 10%, 6 months maximum
Warm-up time (max) : 2 hours to first switching on power

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Specific characteristics
Type of sensors Accuracy Operating
temperature
range
Anti-poison sensor 4F 1% LEL between 0- 70 %LEL -40 to +70°C
(unmarked sensor) 2% of the measurement between 71 and 100% LEL
VQ1 sensor 1% LEL between 0- 70 %LEL -40 to +70°C
(sensor with identifying OLCT 100 : 2% of the measurement between 71 and
mark) 100% LEL
OLC 100 : 5% of the measurement between 71 and 100
% LEL
VQ1 sensor, high 1% LEL between 0-70%LEL -20 to +200°C
temperature assembly 2% of the measurement between 71 and 100% LEL

Mark on sensor VQ1 4F poison resistant sensor

Figure 19: mark on VQ1 sensor

10.4 Toxic sensors (OLCT 100 XP and OLCT 100 IS)

Common characteristics
Measurement principle : Electrochemical sensor
Pressure : Atmospheric ± 10%

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Type of gas Measureme XP Version IS Version Temperature % RH Accuracy Lyfe Reponse Storage Warm-up
nt range range °C (ppm) (months) time conditions time max (h)
(at 20°C)
T50 / T90 (s)
(ppm)

AsH3 Arsine 1.00 ● -20 to +40 20 - 90 +/- 0.05 18 30/120 (1) 1

CH2O Formaldehyde 50.0 ● -20 to +50 15 - 90 +/- 1.5 36 50/240 (1) 36

Cl2 Chlorine 10.0 ● -20 to +40 10 - 90 +/- 0.4 24 10/60 (1) 1

ClO2 Chlorine Dioxide 3.00 ● -20 to +40 10 - 90 +/- 0.3 24 20/120 (1) 1

100 ● ●
+/- 3
CO Carbon monoxide 300 ● ● -20 to +50 15 - 90 36 15/40 (1) 1
(range 0-100)
1,000 ● ●

COCl
Phosgene 1,00 ● -20 to +40 15 - 90 +/- 0.05 12 60/180 (2) 1
2

ETO Ethylene Oxide 30.0 ● -20 to +50 15 - 90 +/- 1 36 50/240 (1) 36

H2 Hydrogen 2,000 ● ● -20 to +50 15 - 90 +/-5 % 24 30/50 (1) 1

30.0 ● ●
+/- 1.5
H2 S Hydrogen Sulfide 100 ● ● -40 to +50 15 - 90 36 15/30 (1) 1
(range 0-30)
1,000 ● ●

30.0 ● +/- 0.4

HCl Hydrogen Chloride -20 to +40 15 - 95 24 30/150 (1) 24
100 ● (range 0-10)

+/- 5
100 ● ● 50/90
Ammonia +/- 20
NH3 1,000 ● ● -20 to +40 15 - 90 24 50/90 (1) 1
+/-150 or
5,000 ● ● 50/120
10%

NH3 Ammonia 1,000 ● ● -40 to +40 15 - 90 +/- 20 24 -- (1) 1

100 ● ●
+/- 2
NO Nitric Oxide 300 ● ● -20 to +50 15 - 90 36 10/30 (1) 12
(range 100)
1,000 ● ●

10.0 ●
NO2 Nitrogen Dioxide -20 to +50 15 - 90 +/- 0.8 24 30/60 (1) 1
30.0 ●

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Type of gas Measureme XP Version IS Version Temperature % RH Accuracy Lyfe Reponse Storage Warm-up
nt range range °C (ppm) (months) time conditions time max (h)
(at 20°C)
T50 / T90 (s)
(ppm)

+/- 0,5% vol.

from 0 to
+50°C
O2 Oxygen(>2years) 0-30% vol ● ● -20 to +50 15 - 90 30 6/15 (1) 1
-1,25% vol.
max from -
20°C to 0°C

+/- 2% of the
+/- 2% of the
measurement
measurement
O2 Oxygen(>5years) 0-30% vol ● -40 to +50 between -10 ° 60 15/25 (1) 1.5
between 15%
C and + 40 °
and 90%
C(3)

PH3 Phosphine 1.00 ● -20 to +40 20 - 90 +/- 0.05 18 30/120 (1) 1

SiH4 Silane 50.0 ● -20 to +40 20 - 95 +/- 1 18 25/120 (1) 1

10,0 ●
+/- 0.7
SO2 Sulfur Dioxide 30.0 ● -20 to +50 15 - 90 36 15/45 (1) 1
(range 0-10)
100 ●
(1) 4 – 20 °C (2) 4 – 20 °C (3) +/-5% max of the measurement over the rest of the
20 – 60 % RH 20 – 60 % RH temperature range according to the metrological standard
EN50104
1 bar ± 10 % 1 bar ± 10 %
6 months maximum 3 months maximum

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10.5 Semiconductor sensors (OLCT 100 XP)

Common characteristics
Measurement principle : semiconductor
Temperature range : -20°C to +55°C
Relative humidity : 20 to 95% RH (non-condensing relative humidity)
Pressure : atmospheric ± 10%
Lifetime (typical) : 40 months
Storage conditions : -20 to 50 °C, 20 to 60% RH, 1 bar ± 10%, 6 months maximum
Warm-up time (max) : 4 hours to first switching on power

Type of gas Measurement range Accuracy T 50 / T 90 (s)

Methyl chlorideCH3Cl 500 ppm +/- 15% 25/50
Methylene chlorideCH2Cl2 500 ppm (from 20 to 70% FS)
Freon R12 1 %vol +/- 15% 25 / 50
Freon R22 2,000 ppm (from 20 to 70% FS)
Freon R123 2,000 ppm
FX56 2,000 ppm
Freon R134a 2,000 ppm +/- 15% 25 / 50
Freon R11 1 % vol (from 20 to 70% FS)
Freon R23 1 % vol
Freon R143a 2,000 ppm
Freon R404a 2,000 ppm
Freon R507 2,000 ppm
Freon R410a 1,000 ppm
Freon R32 1,000 ppm
Freon R407c 1,000 ppm
Freon 408a 4,000 ppm
Ethanol 500 ppm +/- 15% 25 / 50
Toluene 500 ppm (from 20 to 70% FS)
Isopropanol 500 ppm

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Type of gas Measurement range Accuracy T 50 / T 90 (s)

2-butanone ( MEK) 500 ppm
Xylene 500 ppm
R1234yf 1000ppm
R1234ze 1000ppm

10.6 Infrared sensors (OLCT 100 XP-IR)

Measurement range : 0-100% LEL R1234yf
0-2000 ppm R1234yf, R134a, R407f, SF6, R32, R1234ze
0 – 5000 ppm CO2 (carbon dioxide), R1233zd
0 – 5% CO2 (carbon dioxide)
0 – 10% CO2
0 – 100% CO2
Measurement principle : - Infra-red absorption
Pressure : 1 bar ± 10%
Warm-up time (max) : 2 hours to first switching on power

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Type of gas Measureme XP Version Temperature % RH Accuracy Lyfe Reponse time Storage Warm-up
nt range range °C (ppm) (months) T50 / T90 (s) conditions time max (h)

(ppm)

5,000 ● +/- 150

5% ● +/- 0.15%
CO2 carbon dioxide -25 to +50 15 - 90 60 15/30 (6) 2
10% ● +/- 0.3%
100% ● +/- 3%

+/- 40 (from 0 to 50% FS)

R1233zd 5,000 ● -20 to +50 0 - 95 60 40/170 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

R1234yf 2,000 ● 25/120
+/- 100 (from 50 to 100% FS)
(HFO- Tetrafluoropropene -20 to +50 0 - 95 60 (5) 2
+/- 2% (from 0 to 50% LEL)
1234yf) 0-100% LEL ● 30/115
+/- 5% (from 50 to 100% LEL)

+/- 40 (from 0 to 50% FS)

R1234ze 2,000 ● -20 to +50 0 - 95 60 40/170 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

R32 2,000 ● -20 to +50 0 - 95 60 40/170 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

R134a Tetrafluoroethane 2,000 ● -20 to +50 0 - 95 60 40/170 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

R407f 2,000 ● -20 to +50 0 - 95 60 40/105 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

R449a 2,000 ● -20 to +50 0 - 95 60 40/170 (5) 2
+/- 100 (from 50 to 100% FS)

+/- 40 (from 0 to 50% FS)

SF6 Sulfur hexafluoride 2,000 ● -20 to +50 0 - 95 60 50/160 (5) 2
+/- 100 (from 50 to 100% FS)
(5) -40 – 85 °C (6) 4 – 20 °C
0 – 80 % RH 10 – 60 % RH
6 months maximum 6 months maximum

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11 Specific instructions for use in

explosive atmospheres and
operational safety

11.1 General comments

OLC/OLCT 100 conforms to the requirements of European Directive ATEX 2014/34/UE

relating to explosive Dust and Gas atmospheres. On account of their metrological performance
as tested by the accredited organization INERIS (in process), the OLC/OLCT 100 transmitter
detectors intended for the measurement of explosive gases are classed as safety devices in the
sense of the European Directive and may, therefore, contribute to limiting the risks of explosion.
The information given in the following sections should be respected and taken into account by the
manager of the site where the equipment is installed. As far as the aim of improving the health
and safety of workers who are exposed to the risks of explosive atmospheres is concerned, refer
to European Directive ATEX 1999/92/CE.
OLC/OLCT 100 detectors also conform to the requirements of the IEC international certification
scheme relating to explosive Dust and Gas atmospheres.
Two modes of protection can be used:
• The mode of protection using fire-proof housing "db" for gaseous explosive atmospheres,
or housing "tb" for explosive dust atmospheres.
• The intrinsically safe "ia" mode of protection for gaseous explosive or dust atmospheres.

11.2 Cable Entries

Cable glands shall be flameproof certified (‘d’ or ‘db’) for use in explosive atmospheres. Ingress
Protection will be greater or equal to IP66. Cable glands will be mounted according to IEC/EN
60079-14 standard, edition in force, and to additional requirements from local standards. They
shall be of M20x1.5 or ¾ NPT type. In the case of an ISO thread (M20), the engagement shall
be 5 threads at least. Cables used shall have an operating temperature range equal or greater
than 80 °C.

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11.3 Threaded joints

Explosion-proof seals have values different from those specified in the tables of standard EN
60079-1. TELEDYNE OLDHAM SIMTRONICS does not allow repairs and disclaims any
responsibility for material modifications.
The threaded joints on the OLC(T) 100 may be lubricated to maintain fire-proof protection. Only
non-hardening lubricants or non-corrosive agents having no volatile solvents may be used.
Warning: silicone based lubricants are strictly forbidden, since they contaminate the OLC(T) 100
detector elements.

11.4 Electrostatic Hazard

Accessories in plastic material (see Chapter 7) may present a risk of static discharge. Do not rub
with a dry cloth. Clean with water and wipe only with a damp cloth.

11.5 Metrological performance for the detection of

flammable gases
Standard VQ1 OLC/OLCT 100 filament version detectors conform to IEC / EN 60079-29-1
standards, Suitability requirements for the operation of flammable gas detectors, category 0 to
100% LEL Group II, reference gas 0-100% LEL Methane and Propane.
These detectors are classed as safety devices according to ATEX 2014/34/UE Directive and
may, therefore, contribute to limiting the risks of explosion. For this to be so, they must be
connected to TELEDYNE OLDHAM SIMTRONICS type MX 15, MX 32, MX 42A, MX 48, MX
43, MX 52 or MX 62 detection controllers, or connected to measuring systems that are certified
according to IEC / EN standards 60079-29-1 and compatible with their characteristics (see
transfer curve).

11.5.1 Transfer curve

The curve shown gives the transmitter output current as a Output current (mA)

function of the gas concentration. If the user connects the Fault

transmitter to a controller other than the one provided by
TELEDYNE OLDHAM SIMTRONICS, they should be
certain that the transfer curve is fully compatible with the
input characteristics of their equipment to ensure the
proper interpretation of the information provided by the Measurement
transmitter. Similarly, the controller should provide signal (%)

sufficient voltage to compensate for any voltage drop in F lt

the cable.
Figure 20: transfer curve for a 4-20 mA
detector

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11.6 Scope of use

Gas sensors have certain limitations; it is essential to fully recognize these limitations (see Chapter
10).

11.6.1 Presence of specific components

• Vapour from silicone or sulphur-containing components can affect the catalytic gas
detector sensors and thereby distort the measurements. If the sensors have been exposed
to these types of compounds, an inspection or calibration will become necessary.
• High concentrations of organic solvents (e.g. alcohols, aromatic solvents, etc.) or
exposure to quantities of gas greater than the specified range of measurement can
damage the electrochemical sensors. Inspection or calibration is then recommended.
• In the presence of high concentrations of carbon dioxide (CO2 > 1% vol.), the oxygen-
measuring electrochemical sensors can slightly overestimate the concentration of oxygen
(0.1 to 0.5% O2 overestimate).

11.6.2 Operation under low oxygen levels

• If an electrochemical detector sensor is used in an atmosphere comprising less than 1%
oxygen for over one hour, the measurement may be an underestimate.
• If a semiconductor detector sensor is used in an atmosphere comprising less than 10%
oxygen, the measurement may be an underestimate.
• If a semiconductor detector sensor is used in an atmosphere comprising less than 18%
oxygen, the measurement may be an underestimate.

11.7 Functional safety

The detector is certified by INERIS (in process) to be in conformity with the requirements of
standard EN 50402 for SIL capability 1 and 2 for the CH4 and HC versions. Applicable since
2005, this standard is concerned with electrical apparatuses for the detection and measurement
of oxygen or toxic or flammable gases or vapors, and defines the requirements relating to the
safety function of fixed gas detection systems.
The detector has been developed in conformity with standard EN/CEI 61508.
The safety function of the OLC/OLCT 100 detector is the detection of flammable gases using
catalytic technology and a 4-20 mA current output proportional to the gas concentration
expressed as a percentage of LEL, respectively from 0 to 100% LEL. In the event of failure, the
current will assume a fall-back value less than or equal to 1 mA or greater than or equal to 23
mA.

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The safety function is no longer valid:

• After power has been switched on, while the measurement sensor is stabilizing and during
start-up tests, the output current shall be in maintenance mode (2 mA).
• When the push button is pressed (forcing the current to 4 mA), the output current will be
frozen at 4 mA.

11.8 Reliability data

These data are based on feedback from experience in the field. The analysis of the information
recorded during maintenance by our technical team has enabled us to determine the following
Probabilities of Failure on Demand under normal conditions of use:
Type of gas Measurement SIL λDU PFDAVG Test period SFF
principle Capability
LEL Catalytic (VQ1) SIL 2 1,89 10-7 8,3 10-4 12 months 92,9%
Oxygen(*) Electrochemical SIL 2 0,74 10-6 1.62 10-3 6 months 60% to 90%
CO (*)
Electrochemical SIL 2 1,09 10 -6
1,19 10 -3
3 months 60% to 90%
H 2S (*)
Electrochemical SIL 2 2,98 10 -6
3,26 10 -3
3 months 60% to 90%
NH3(*) Electrochemical SIL 2 4,48 10-6 4,91 10-3 3 months 60% to 90%
(*) Software and hardware according to INERIS certificate. Sensors data according to proven
in use.

11.9 Special conditions of use

In case of exposure above the measuring range, it is mandatory to bump test the
instrument with gas and/or to perform a calibration.
In the event of a change of position, it is necessary to re-calibrate the detector.

OLCT 100 IS (intrinsic safety mode of protection)

The detector must be powered by an intrinsically safe source.
The detector input characteristics on the J3 power plot are:
• Ui = 28V
• Ii = 93.3mA
• Ci = 39.5nF
• Li = 0H

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12 Appendix |Ordering information

12.1 Gas List

Please find below the list of gases that the OLC/OLCT 100 detector can detect.
Gas Code Gas
001 Methane 0-100 % LEL
002 Methane 0-100% LEL (4.4% vol)
003 Hydrogen 0-100% LEL
004 Butane 0-100% LEL
005 Propane 0-100% LEL
006 Ammoniac 0-100% LEL
007 Ethyl Acetate 0-100% LEL
008 Butyl Acetate 0-100% LEL
009 Methyl acetate methyle 0-100% LEL
010 Acetone 0-100% LEL
011 Acetonitrile 0-100% LEL
012 Acetylene 0-100% LEL
013 Acrylic acid 0-100% LEL
014 Acroleine 0-100% LEL
015 Butyl acrylate 0-100% LEL
016 Ethyl Acrylate 0-100% LEL
017 Acrylonitrile 0-100% LEL
018 Benzene 0-100% LEL
019 1.3-Butadiene 0-100% LEL
020 Butanol (isobutanol) 0-100% LEL
021 2-Butanone 0-100% LEL
022 Cumene 0-100% LEL
023 Cyclohexane 0-100% LEL
024 Cyclohexanone 0-100% LEL
025 Dimethylether 0-100% LEL
026 Dodecane 0-100% LEL
027 Ethane 0-100% LEL
028 Ethanol 0-100% LEL
029 Ether (diethylether) 0-100% LEL
030 Ethylene 0-100% LEL
031 Formaldehyde 0-100% LEL
032 LPG 0-100% LEL
033 Diesel 0-100% LEL
034 Natural gas 0-100% LEL
035 Heptane 0-100 % LEL

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Gas Code Gas

036 Hexane 0-100% LEL
038 Isobutane 0-100% LEL
039 Isobutene 0-100% LEL
040 Isopropanol 0-100% LEL
041 Kerosene (JP4) 0-100% LEL
042 Methyl Methacrylate 0-100% LEL
043 Methanol 0-100% LEL
044 Methylamine 0-100% LEL
045 Naphta 0-100% LEL
046 Naphtalene 0-100% LEL
047 Nonane 0-100% LEL
048 Octane 0-100% LEL
049 Ethylene Oxide (epoxyethane) 0-100% LEL
050 Propylene Oxide (Epoxypropane) 0-100% LEL
051 Pentane 0-100% LEL
052 Propylene 0-100% LEL
054 Styrene 0-100% LEL
055 Gasoline Lead free 0-100% LEL
056 Toluene 0-100% LEL
057 Trimethylamine 0-100% LEL
058 White spirit 0-100% LEL
059 Xylene 0-100% LEL
064 MIBK 0-100% LEL
065 R1234yf 0-100% LEL
066 DMA 0-100% LEL
068 Chloroethane 0-100% LEL
070 Chloromethane, 0-100% LEL
072 Cyclopentane 0-100% LEL
074 Allyl alcohol 0-100% LEL
200 Oxygen O2 (electrochemical) 0-30% vol (life expectancy 2 years)
272 Oxygen O2 (electrochemical) 0-30% vol (life expectancy 5 years)
282 Oxygen O2 (electrochemical) 0-10% vol (life expectancy 5 years)
203 CO, 0-100 ppm
204 CO, 0-300 ppm
205 CO, 0-1,000 ppm
213 H2S, 0-30 ppm
214 H2S, 0-100 ppm
215 H2S, 0-1,000 ppm
249 H2S, 0-5000 ppm
216 NO, 0-100 ppm
217 NO, 0-300 ppm
218 NO, 0-1,000 ppm

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Gas Code Gas

219 NO2, 0-10 ppm
220 NO2, 0-30 ppm
221 SO2, 0-10 ppm
222 SO2, 0-30 ppm
223 SO2, 0-100 ppm
224 Cl2, 0-10 ppm
259 Cl2, 0-20 ppm
225 H2, 0-2,000 ppm
268 H2, 0-4% volume
227 HCl, 0-30 ppm
228 HCl, 0-100 ppm
229 HCN, 0-10 ppm
230 HCN, 0-30 ppm
231 NH3, 0-100 ppm
273 NH3, 0-300 ppm
232 NH3, 0-1,000 ppm
265 NH3, 0-1,000 ppm (low temperature -40°C)
233 NH3, 0-5,000 ppm
235 ClO2, 0-3 ppm
252 CO2, 0-5,000 ppm
239 CO2, 0-5%
240 CO2, 0-10 % volume
241 CO2, 0-100 % volume
242 PH3, 0-1 ppm
243 AsH3, 0-1 ppm
244 ETO, 0-30 ppm
245 SiH4, 0-50 ppm
246 COCl2, 0-1 ppm
247 Formaldehyde, 0-50 ppm
270 Formaldehyde, 0-150 ppm
248 ETO, 0-100 ppm
250 Methanol, 0-1,000 ppm
286 N2H4, 0-2 ppm
253 Ethyl Mercaptant, 0-100 ppm
254 Dimethyl sulfide, 0-100 ppm
261 CH4S, 0-100 ppm
500 R12, 0-1% volume
501 R22, 0-2,000 ppm
502 R134a, 0-2,000 ppm
505 R11, 0-1% volume
506 R23, 0-1% volume
507 Dichloromethane, 0-500 ppm

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Gas Code Gas

508 Chloromethane (Methylchloride), 0-500 ppm
509 R123, 0-2,000 ppm
510 FX56, 0-2,000 ppm
511 R143a, 0-2,000 ppm
512 R404a, 0-2,000 ppm
513 R507, 0-2,000 ppm
514 R410a, 0-1,000 ppm
515 R32, 0-1,000 ppm
517 R407c, 0-1,000 ppm
518 R408a, 0-4,000 ppm
519 R407f, 0-1,000ppm
520 R434A, 0-4000ppm
521 R245FA, 0-1000ppm
523 R407A, 0-1000ppm
524 R422D, 0-4000ppm
525 R1234ZE, 0-1000ppm
533 R1234ZE, 0-2000ppm
662 R1234YF, 0-1000 ppm
526 R1234YF, 0-2000ppm
532 R1233ZD, 0-5000ppm
528 R407f, 0-2,000ppm
529 R449, 0-2000ppm
531 R32, 0-2000ppm
527 SF6, 0-2,000ppm
656 Ethanol, 0-500 ppm
657 Toluene, 0- 500 ppm
658 Isopropanol, 0-500 ppm
659 2-Butanone (MEK), 0-500 ppm
660 Xylene, 0-500 ppm
661 Styrene, 0-500 ppm
663 Benzene, 0-500ppm

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To know you part number, please follow these instructions:

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AMERICAS EMEA ASIA PACIFIC
14880 Skinner Rd Rue Orfila Room 04, 9th Floor, 275
Cypress Z.I. Est – CS 20417 Ruiping Road, Xuhui District
TX 77429, 62027 ARRAS Cedex, SHANGHAI
USA FRANCE CHINA
Tel.: +1-713-559-9200 Tel.: +33 (0)3 21 60 80 80 Tel.: +86-134-8229-5057

www.teledynegasandflamedetection.com

© 2021 TELEDYNE OLDHAM SIMTRONICS. All right reserved.

NPO100GB Revision M.1 / March 2021