Product review

Electrical temperature
measuring instruments
Part of your business

Contents

WIKA product lines 3

Resistance thermometers 4

Thermocouples 10

Temperature transmitters 13
Fully automatic production
of measuring instruments
Digital indicators, temperature controllers 14

Thermowells 16

Special instrument designs 18

Accessories 19

Technical information 20
The modern high-bay
WIKA worldwide 28
warehouse ensures
efficient logistics

Ability to meet any challenge

Our knowledge for your success Made by WIKA

In the course of the last six decades the name WIKA has The development and high-tech production in our owned
become a symbol for sophisticated solutions in the field of modern production facilities (Germany, Brazil, Canada,
pressure and temperature measurement. China, India, Italy, Poland, South Africa, Switzerland and
USA) is the best warranty for our flexibility.
Our ever increasing ability is the basis for implementation of
innovative technologies in the form of reliable products and Whether SMD automatic insertion machines, CNC automatic
efficient system solutions. machining centres, welding robots, laser welding, sputterers,
thermotransfer printing or thin film production - we exploit all
We owe our leading position in the world market to the possibilities to achieve above-average results. And the end
consistent dedication towards premium quality, to which, result: More than 50 million quality products are delivered
today, 7,900 employees of the WIKA group of companies are year in, year out, in more than 100 countries. Worldwide,
committed. More than 500 experienced sales representatives approximately 600 million WIKA measuring instruments are
provide competent and individual advice and support for our in use.
customers from the beginning.
Everywhere and anytime.

Certified quality

The WIKA quality assurance management system has been

certified in accordance with ISO 9001 since 1994. The quality
and safety standards of our company meet the standard
systems of several countries. DKD/DAkkS accredited
calibration laboratories
for pressure and
temperature

2
 WIKA product lines

WIKA product lines

The WIKA programme covers the following product lines for various fields of application.

Electronic pressure measurement Electrical temperature measurement

WIKA offers a complete range of electronic pressure Our range of products includes thermocouples, resistance
measuring instruments: pressure sensors, pressure switches, thermometers (also with on-site display), temperature switches
pressure transmitters and process transmitters for the as well as analogue and digital temperature transmitters for all
measurement of gauge, absolute and differential pressure. industrial applications. Measuring ranges from -200 to +1,600 °C
Our pressure measuring instruments are available in the are covered.
measuring ranges 0 ... 0.6 mbar to 0 ... 15,000 bar. These
instruments come supplied with standardised current or
voltage output signals (also intrinsically safe per ATEX or with Mechatronic temperature measurement
flameproof enclosure), interfaces and protocols for various
As a result of the integration of switch contacts and output
field buses. Whether ceramic thick film, metal thin film or
signals into our mechanical temperature measuring instru-
piezo-resistive, WIKA is the leading manufacturer worldwide
ments, we can offer a wide variety of combined instruments.
that develops and produces the full range of today’s leading
With switch contacts the pointer position triggers a change-
sensor technologies.
over. Electrical output signals are realised via an additional,
independent sensor circuit (resistance thermometer or
thermocouple).
Mechatronic pressure measurement
As a result of the almost unlimited options for different
combinations of mechanical and electrical connections, an Mechanical temperature measurement
extraordinary range of instrument variants is possible. Various
The mechanical temperature measuring instruments work on
digital and analogue output signals are also available for
the bimetal, expansion or gas actuation principle and cover
these measuring instruments.
scale ranges from -200 ... +700 °C. All thermometers are
For our measuring instruments we use latest sensors, tested
suited for operation in a thermowell if necessary.
in automotive applications millions of times over. They work
without any kind of mechanical contact, consequently they
are wear-resistant, and there's absolutely no influence on the
Level measurement
mechanics.
WIKA has a comprehensive range of level measuring
instruments available for temperatures up to 450 °C, specific
Mechanical pressure measurement gravity from 400 kg/m³ and pressure ranges up to 420 bar.
This includes standard instruments and customised
Indicating pressure gauges for gauge, absolute and dif-
products.
ferential pressure with Bourdon tube, diaphragm or capsule
pressure elements have been tested millions of times over.
These instruments cover scale ranges from 0 … 0.5 mbar to
Calibration technology
0 … 7,000 bar and indication accuracies of up to 0.1 %.
WIKA offers a broad product range of calibration instruments
for the physical units of measurement for pressure and
Diaphragm seals temperature, and for electrical measurands. Numerous
patents ensure unmatched performance from many of
WIKA diaphragm seals, mounted with pressure gauges, pres-
our calibration instruments. The range of services covers
sure transducers, pressure transmitters etc., are recognised
the calibration of pressure and temperature measuring
and valued internationally for the most difficult of measuring
instruments in our accredited DKD/DAkkS calibration
tasks. The measuring instruments can therefore be used at
laboratories and a mobile service to calibrate your
extreme temperatures (-130 ... +400 °C), and with aggres-
instruments on site.
sive, corrosive, heterogeneous, abrasive, highly viscous or
toxic media. The optimal diaphragm seal designs, materials
and filling media are available for each application.

For all product lines product reviews are available.

3
Resistance thermometers

TR10-A TR10-B TR10-C

Measuring insert For additional thermowell Threaded, with fabricated
thermowell

Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100
Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C
Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire
Data sheet: TE 60.01 Data sheet: TE 60.02 Process connection: Mounting thread
Data sheet: TE 60.03

TR10-D TR10-F TR10-H

Threaded, miniature design Flanged resistance thermometer, Without thermowell
with fabricated thermowell

Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100
Measuring range: -200 … +500 °C Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C
Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire
Process connection: Mounting thread Process connection: Flange Process connection: Mounting thread
Data sheet: TE 60.04 Data sheet: TE 60.06 Data sheet: TE 60.08

4
 Resistance thermometers

TR10-J TR10-K TR10-L

Threaded, with perforated Measuring insert, for installation in Flameproof enclosure, for
thermowell TR10-L additional thermowell

Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100
Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C
Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire
Process connection: Mounting thread Data sheet: TE 60.11 Data sheet: TE 60.12
Data sheet: TE 60.10

TR12-B TR12-M TR30

Process resistance thermometer, Process resistance thermometer, Compact version
for additional thermowell basic module

Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100
Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C Measuring range: -50 ... +250 °C
Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire Output: Pt100, 4 ... 20 mA, 0 ... 10 V
Option: Ex i, Ex d Option: Ex i, Ex d Data sheet: TE 60.30
Data sheet: TE 60.17 Data sheet: TE 60.17

Further information at www.wika.com

5
Resistance thermometers

TR31 TR40 TR50

Miniature design Cable resistance thermometer Surface resistance thermometer

Sensor element: 1 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100
Measuring range: -50 ... +250 °C Measuring range: -200 … +600 °C Measuring range: -50 ... +250 °C
Output: Pt100, 4 ... 20 mA Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire
Data sheet: TE 60.31 Cable: PVC, silicone, PTFE Process connection: Surface mounting
Data sheet: TE 60.40 Data sheet: TE 60.50

TR53 TR55 TR60

Bayonet resistance thermometer With spring-loaded tip Indoor and outdoor resistance
thermometer

Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100 Sensor element: 1 x Pt100, 2 x Pt100
Measuring range: -50 ... +400 °C Measuring range: -50 ... +450 °C Measuring range: -40 ... +80 °C
Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire Connection method: 2-, 3- and 4-wire
Process connection: Bayonet Process connection: Compression fitting Process connection: Wall mounting
Data sheet: TE 60.53 Data sheet: TE 60.55 Data sheet: TE 60.60

6
 Resistance thermometers
Temperature switches

Resistance TSD-30

thermometers,
Electronic temperature switch

temperature switches

PSD-30
LSD-30
Sensor element: Pt1000
Measuring range: -20 ... +80 °C
Switching output: 1 or 2 (PNP or NPN), analogue output
(optional)
Data sheet: TE 67.03

TR75 TR81 TF-LCD

DiwiTherm® with digital indicator For flue gas temperature Longlife digital thermometer
measurements

Measuring range: ■■ -50 ... +450 °C Sensor element: 1 x Pt100, 2 x Pt100 Measuring range: -40 ... +120 °C
■■ -50 ... +199.9 °C Measuring range: -200 ... +600 °C Special feature: ■■ Resistant to steam diffusion
Power supply: Battery operation Connection method: 2-, 3- and 4-wire ■■ Battery or solar powered
Data sheet: TE 60.75 Thermowell: Metal ■■ Extremely long service life
Data sheet: TE 60.81 Data sheet: TE 85.01

TF35 TF44 TF45

OEM screw-in thermometer, with Strap-on temperature sensor with OEM insertion thermometer with
plug connection connecting cable connecting cable

Measuring range: -50 ... +300 °C Measuring range: -50 ... +200 °C Measuring range: -50 ... +260 °C
Measuring element: Pt100, Pt1000, NTC, KTY, Ni1000 Measuring element: Pt100, Pt1000, NTC Measuring element: Pt100, Pt1000, NTC, KTY, Ni1000
Special feature: ■■ Compact design Special feature: ■■ Connecting lead from PVC, silicone Special feature: ■■ Connecting lead from PVC, silicone,
■■ High vibration resistance ■■ Thermowell from aluminium PTFE
■■ Plug connector for electrical connection ■■ Mounting on pipe surfaces ■■ With single or dual measuring element
Data sheet: TE 67.10 Data sheet: TE 67.14 ■■ Thermowells from stainless steel
Data sheet: TE 67.15

Further information at www.wika.com

7
Resistance thermometers for
sanitary applications

TR20 TR21-A TR21-B

Flush Miniature design with flange Miniature design for orbital
connection welding

® ® ®

74 - 06 74 - 06 74 - 06

Sensor element: Pt100 Sensor element: Pt100 Sensor element: Pt100

Measuring range: -50 ... +250 °C Measuring range: -50 ... +250 °C Measuring range: -50 ... +250 °C
Connection method: 2-, 3- and 4-wire Output: Pt100, 4 ... 20 mA Output: Pt100, 4 ... 20 mA
Data sheet: TE 60.20 Connection to Connection to
thermowell: Removable G ⅜" thermowell: Removable G ⅜"
Data sheet: TE 60.26 Data sheet: TE 60.27

TR21-C
Miniature design with welded
flange connection

74 - 06

Sensor element: Pt100

Measuring range: -50 ... +250 °C
Output: Pt100, 4 ... 20 mA
Connection to
thermowell: Welded
Data sheet: TE 60.28

8
 Resistance thermometers
for sanitary applications

TR22-A TR22-B TR25

With flange connection For orbital welding In-line resistance thermometer

® ® ®

NAMUR
74 - 06 74 - 06 74 - 06

Sensor element: Pt100 Sensor element: Pt100 Sensor element: Pt100

Measuring range: -50 ... +250 °C Measuring range: -50 ... +250 °C Measuring range: -50 ... +250 °C
Connection to Connection to Connection method: 3- or 4-wire
thermowell: Removable M24 thermowell: Removable M24 Data sheet: TE 60.25
Data sheet: TE 60.22 Data sheet: TE 60.23

Further information at www.wika.com

9
Thermocouples

TC10-A TC10-B TC10-C

Measuring insert For additional thermowell Threaded, with fabricated
thermowell

Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T

Measuring range: -200 … +1,200 °C Measuring range: -200 … +1,200 °C Measuring range: -200 … +600 °C
Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded
Data sheet: TE 65.01 Data sheet: TE 65.02 Process connection: Mounting thread
Data sheet: TE 65.03

TC10-D TC10-F TC10-H

Threaded, miniature design Flanged thermocouple, with Without thermowell
fabricated thermowell

Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T

Measuring range: -200 … +600 °C Measuring range: -200 … +600 °C Measuring range: -200 … +1,200 °C
Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded
Process connection: Mounting thread Process connection: Flange Process connection: Mounting thread
Data sheet: TE 65.04 Data sheet: TE 65.06 Data sheet: TE 65.08

10
 Thermocouples

TC10-K TC10-L TC12-B

Measuring insert, for installation in Flameproof enclosure, for Process thermocouple, for
TC10-L additional thermowell additional thermowell

Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T

Measuring range: -200 … +1,200 °C Measuring range: -200 … +1,200 °C Measuring range: -200 … +1,200 °C
Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded
Data sheet: TE 65.11 Data sheet: TE 65.12 Option: Ex i, Ex d
Data sheet: TE 65.17

TC12-M TC40 TC46

Process thermocouple, basic Cable thermocouple Hot runner thermocouple
module

Sensor element: Type K, J, E, N or T Sensor element: Type K, J, E, N or T Sensor element: Type J or K

Measuring range: -200 … +1,200 °C Measuring range: -200 ... +1,260 °C Measuring range: -25 … +400 °C
Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded
Option: Ex i, Ex d Cable: PVC, silicone, PTFE, glass fibre Special feature: ■■ Sensor diameter 0.5 ... 3.0 mm
Data sheet: TE 65.17 Data sheet: TE 65.40 ■■ Plastic-moulded transition
Data sheet: TE 65.46

Further information at www.wika.com

11
Thermocouples

Thermocouples

TC47 TC50 TC53

Plastics machinery thermocouple Surface thermocouple Bayonet thermocouple

Sensor element: Type J, or K Sensor element: Type K, J, E, N or T Sensor element: Type J, K, N or T

Measuring range: -25 … +400 °C Measuring range: -200 ... +400 °C Measuring range: -200 ... +1,200 °C
Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded Measuring point: Ungrounded or grounded
Special feature: ■■ Various process connections Process connection: Surface mounting Special feature: ■■ Single and dual thermocouples
■■ Connection cable glass fibre, Kapton Data sheet: TE 65.50 ■■ Explosion-protected version Ex i
Data sheet: TE 67.20 (optional)

TC59-V TC80 TC81

V-PAD pipe surface thermocouple Straight version per EN 50446 For flue gas temperature
for fuelling plants measurements

Sensor element: Type K or N Sensor element: Type S, R, B, K, N or J Sensor element: Type K, N or J

Measuring range: 0 ... +1,200 °C Measuring range: -200 ... +1,600 °C Measuring range: -200 ... +1,200 °C
Measuring point: Grounded Measuring point: Ungrounded Measuring point: Ungrounded or grounded
Process connection: V-PAD for welding Process connection: Stop flange, threaded bushing Process connection: Stop flange, threaded bushing
Data sheet: TE 65.59 Data sheet: TE 65.80 Data sheet: TE 65.81

12
 Temperature transmitters

Temperature T32

transmitters
HART® transmitter

Input: Resistance thermometers, thermocouples,

potentiometers
Accuracy: < 0.12 %
Output: 4 … 20 mA, HART® protocol
Special feature: PC configurable
Data sheet: TE 32.04

T19 T24 T12

Analogue transmitter 2-wire, Programmable analogue Universally programmable digital
4 ... 20 mA transmitter transmitter

Input: Pt100 Input: Pt100 Input: Resistance thermometers, thermocouples

Accuracy: < 0.50 % Accuracy: < 0.20 % Accuracy: < 0.25 %
Output: 4 … 20 mA Output: 4 … 20 mA Output: 4 … 20 mA
Special feature: Excellent price/performance ratio Special feature: PC configurable Special feature: PC configurable
Data sheet: TE 19.03 Data sheet: TE 24.01 Data sheet: TE 12.03

T53 T91 TIF50, TIF52

FOUNDATION™ Fieldbus and Analogue transmitter 3-wire, HART® field temperature
PROFIBUS® PA transmitter 0 ... 10 V transmitter

Input: Resistance thermometers, thermocouples Input: Resistance thermometers, thermocouples Input: Resistance thermometers, thermocouples,
Accuracy: < 0.10 % Accuracy: < 0.5 or < 1 % potentiometers
Special feature: PC configurable Output: 0 … 10 V, 0 … 5 V Accuracy: < 0.12 %
Data sheet: TE 53.01 Special feature: Fixed measuring range Output: 4 … 20 mA, HART® protocol
Data sheet: TE 91.01, TE 91.02 Special feature: PC configurable
Data sheet: TE 62.01

Further information at www.wika.com

13
Digital indicators

Digital indicators

DI15 DI25 DI35

For panel mounting, For panel mounting, For panel mounting,
48 x 24 mm 96 x 48 mm 96 x 48 mm

Input: Multi-function input for resistance Input: Multi-function input for resistance Input: ■■ Multi-function input for resistance
thermometers, thermocouples and thermometers, thermocouples and thermometers, thermocouples and
standard signals standard signals standard signals
Alarm output: 2 electronic contacts Alarm output: ■■ 3 relays ■■ Alternatively double input for standard
Power supply: DC 9 … 28 V ■■ 2 relays for instruments with integrated signals with calculation function (+ - x /)
Data sheet: AC 80.01 transmitter power supply DC 24 V for two transmitters
Power supply: ■■ AC 100 … 240 V Alarm output ■■ 2 relays
■■ AC/DC 24 V (optional): ■■ 4 relays
Special feature: Analogue output signal Power supply: ■■ AC 230 V
Data sheet: AC 08.02 ■■ AC 115 V or DC 24 V
Data sheet: AC 80.03

DIH10 DIH50
Connection head with digital For current loops with HART®
indicator communication

Input: 4 ... 20 mA Dimensions: 150 x 127 x 127 mm

Power supply: From the 4 ... 20 mA current loop Case: Aluminium, stainless steel
Data sheet: AC 80.11 Special feature: ■■ Adjustment of indication range and unit
via HART® communication
■■ Additionally, model DIH52-F is suitable
for multidrop operation and with local
master function
Approval: ■■ Intrinsically safe per ATEX
■■ Flameproof enclosure
Data sheet: AC 80.10

14
 Temperature controllers

Temperature controllers

CS4M, CS4S CS4H, CS4L SC58

For panel mounting, 48 x 24 For panel mounting, For panel mounting,
mm, 48 x 48 mm 48 x 96 mm, 96 x 96 mm 62 x 28 mm

Input: Multi-function input for resistance Input: Multi-function input for resistance Input: Pt100 or PTC
thermometers, thermocouples and thermometers, thermocouples and Control
standard signals standard signals characteristic: Simple 2-point controller
Control Control Control output: Relay switching output 12 A, 250 V
characteristic: PID, PI, PD, P, ON/OFF (configurable) characteristic: PID, PI, PD, P, ON/OFF (configurable) Power supply: ■■ AC 230 V
Control output: Relay or logic level DC 0/12 V for 3-point Control output: Relay or logic level DC 0/12 V for 3-point ■■ AC 12 ... 24 V or DC 16 ... 32 V
control to control an electronic switch control to control an electronic switch Data sheet: AC 85.24
relay (SSR) or analogue current signal 4 relay (SSR) or analogue current signal 4
… 20 mA … 20 mA
Power supply: ■■ AC 100 … 240 V Power supply: ■■ AC 100 … 240 V
■■ AC/DC 24 V ■■ AC/DC 24 V
Data sheet: AC 85.06, AC 85.02 Data sheet: AC 85.03, AC 85.04

SC64 CS4R
For panel mounting, For rail mounting,
64 mm, round 22.5 x 75 mm

Input: Pt100 or PTC Input: Multi-function input for resistance

Control thermometers, thermocouples and
characteristic: Simple 2-point controller standard signals
Control output: Relay switching output 16 A, 250 V Control
Power supply: ■■ AC 230 V characteristic: PID, PI, PD, P, ON/OFF (configurable)
■■ AC 12 ... 24 V or DC 16 ... 32 V Control output: Relay or logic level DC 0/12 V to control an
Data sheet: AC 85.25 electronic switch relay (SSR) or analogue
current signal 4 … 20 mA
Power supply: ■■ AC 100 … 240 V
■■ AC/DC 24 V
Data sheet: AC 85.05

Further information at www.wika.com

15
Thermowells

TW10 TW15 TW20

Flanged (solid machined) Threaded (solid machined) Socket weld (solid-machined)

Thermowell form: Tapered, straight or stepped Thermowell form: Tapered, straight or stepped Thermowell form: Tapered, straight or stepped
Nominal width: ASME 1 to 4 inch DIN/EN DN 25 to DN 100 Head version: Hexagon, round with hexagon, or round Welding diameter: 1.050, 1.315 or 1.900 inch
Pressure rating: ASME to 2,500 psig (DIN/EN to PN 100) with spanner flats (26.7, 33.4 or 48.3 mm)
Data sheet: TW 95.10, TW 95.11, TW 95.12 Process connection: ½, ¾ or 1 NPT Pressure rating: 3,000 or 6,000 psig
Data sheet: TW 95.15 Data sheet: TW 95.20

TW22 TW25 TW30

Fabricated with flange connection Weld–in (solid-machined) Vanstone (solid-machined) for
for sanitary applications lapped flanges

74 - 06

Aseptic connection: ■■ DIN 11851 Thermowell form: Tapered, straight or stepped Thermowell form: Tapered, straight or stepped
■■ DIN 32676 Head diameter: Up to 2 inch (50.8 mm) Nominal width: ASME 1, 1½ or 2 inch
■■ Tri-clamp Data sheet: TW 95.25 Pressure rating: ASME up to 2,500 psig
■■ VARIVENT® Data sheet: TW 95.30
■■ BioControl®
Thermowell material: Stainless steel 1.4435
Data sheet: TW 95.22

VARIVENT® is a registered trademark of the company GEA Tuchenhagen

16 BioControl® is a registered trademark of the company NEUMO
 Thermowells

TW35 TW40 TW45

Threaded (fabricated) Flanged (fabricated) Threaded
(DIN 43772 form 2, 2G, 3, 3G) (DIN 43772 form 2F, 3F) (fabricated, DIN 43772 form 5, 8)

Thermowell form: Form 2, 2G, 3 or 3G Thermowell form: Form 2F or 3F Thermowell form: Form 5 or 8
Material: Stainless steel Nominal width: DIN/EN DN 25 to DN 50 ASME 1 to 2 inch Material: Stainless steel or copper alloy
Instrument Pressure rating: DIN/EN up to PN 100 Data sheet: TW 95.45
connection: M24 x 1.5 rotatable (ASME up to 1,500 psig)
Data sheet: TW 95.35 Data sheet: TW 95.40

TW50 TW55 TW61

Threaded (solid-machined, Solid-machined for weld-in or with For orbital welding for sanitary
DIN 43772 form 6, 7, 9) flange (DIN 43772 form 4, 4F) applications

74 - 06

Thermowell form: Form 6, 7 or 9 Thermowell form: Form 4 or 4F Tube standard: DIN 11866 series A, B, C
Data sheet: TW 95.50 Nominal width: DIN/EN DN 25 to DN 50 ASME 1 to 2 inch Material: Stainless steel 1.4435
Pressure rating: DIN/EN up to PN 100 Data sheet: TW 95.61
(ASME up to 2,500 psig)
Data sheet: TW 95.55

Further information at www.wika.com

17
Special instrument designs
For your individual applications, WIKA can offer specific temperature measuring instruments.

Resistance thermometers
„„ Resistance thermometers with multipoint sensors, for
applications requiring high precision for monitoring
vessels and for level control.

„„ Resistance thermometers with non-standard or country-

specific temperature coefficients.

Thermocouples
„„ Free-hanging and spring-loaded multipoint
thermocouples and multipoint thermocouples with
fabricated thermowell for use in catalytic reactors,
reformers and heat exchangers.

„„ High-pressure thermocouples for use with highest

process pressures (4,500 bar).

„„ Thermocouples for gas turbines, to measure input and

combustion chamber temperatures. Multipoint thermometer Tx95
High-pressure thermocouple TC90
„„ Hot-runner and nozzle thermocouples and melt-bolt type
thermocouples for the plastics and rubber industries.
Thermowells
„„ Borehole thermocouples for temperature monitoring in „„ Thermowells with metal or polymer coating: Special
various zones in oil and gas wells. metallic plating or polymer coatings can be applied to the
These mineral-insulated, metal-sheathed thermocouples surface of a thermowell so it can
can exceed 3,000 metres (10,000 ft) in length. be used in a process where there
is a high risk of abrasion, due to
a high flow of suspended solids,
or where high concentrations of
acids may cause corrosion.

„„ Thermowells with anchor

support: On customer
request, the thermowell can be
manufactured with a support
collar in order to offer additional support
in the flange nozzle for applications with
high flow rates.

„„ Thermowells for medium sampling:

These thermowells are delivered with
an open tip, to enable process sampling
and for injection of chemicals into a
piping system or vessel.

Multipoint thermocouple designs

18
 Accessories

Accessories

Temperature calibrators Hand-held measuring instruments magWIK magnetic quick connector

Coupler connector Fittings Wires & cables

Further information at www.wika.com

19
Technical information

Measuring resistors
„„ Industrial resistance thermometers are equipped with
platinum temperature sensors which change their
electrical resistance as a function of temperature.

Fig. left: Thin-film resistor

Fig. centre: Glass resistor
Fig. right: Ceramic resistor

„„ In accordance with DIN EN 60751 (IEC 60751), resistance thermometers and measuring resistors are divided into
accuracy classes. For wire-wound resistors and film resistors, these accuracy classes are assigned to the corresponding
temperature ranges.

Class Temperature range Tolerance value

Wire-wound (W) Thin-film (F)
B °C -196 … +600 -50 … +500 ±(0.30 + 0.0050 | t |) 1)

A °C -100 … +450 -30 … +300 ±(0.15 + 0.0020 | t |) 1)

AA °C -50 … +250 0 … 150 ±(0.10 + 0.0017 | t |) 1)

1) | t | is the value of the temperature in °C without consideration of the sign.

„„ The electrical resistance of a resistance thermometer's sensor changes with the temperature.
As the resistance increases when temperature is raised, we refer to it as PTC (Positive Temperature Coefficient).

Resistance values and tolerance values with selected temperatures (Pt100)

Resistance value in Ω
Temperature in °C (ITS 90)
Tolerance class B Tolerance class A Tolerance class AA
-196 19.69 ... 20.80 - -

-100 59.93 ... 60.58 60.11 ... 60.40 -

-50 80.09 ... 80.52 80.21 ... 80.41 80.23 ... 80.38

-30 88.04 ... 88.40 88.14 ... 88.30 88.16 ... 88.28

0 99.88 ... 100.12 99.94 ... 100.06 99.96 ... 100.04

20 107.64 ... 107.95 107.72 ... 107.87 107.74 ... 107.85

100 138.20 ... 138.81 138.37 ... 138.64 138.40 ... 138.61

150 156.93 ... 157.72 157.16 ... 157.49 157.91 ... 157.64

250 193.54 ... 194.66 193.86 ... 194.33 193.91 ... 194.29

300 211.41 ... 212.69 211.78 ... 212.32 -

450 263.31 ... 265.04 263.82 ... 264.53 -

500 280.04 ... 281.91 - -

600 312.65 ... 314.77 - -

20
 Technical information

Sensor connection methods

2-wire connection
The lead resistance to the sensor is recorded as an error in red
the measurement. For this reason, this connection type is not
allowed when using Pt100 measuring resistors for accuracy
classes A and AA, since the electrical resistance of the
white
connection lines and their own temperature dependence are
fully included in the measurement result and thus falsify it.

Applications

„„ Connecting cables up to 250 mm

„„ Standard when using Pt1000 measuring resistors

3-wire connection (standard version)

The influence of the lead resistance is compensated as red
far as possible. The maximum length of the connecting red
cable depends on the conductor cross-section and the
compensation options of the electronic evaluation system
(transmitter, display, controller or process control system).
white

Applications

„„ Connecting cables up to approx. 30 m

4-wire connection
The influence of the connecting cable on the result of
red
measurement is completely eliminated since any possible
red
asymmetries in the connecting cable's lead resistance are
also compensated. The maximum length of the connecting
cable depends on the conductor cross-section and the white
compensation options of the electronic evaluation system white
(transmitter, display, controller or process control system).
A 4-wire connection can also be used as a 2-wire or 3-wire
connection by disconnecting the unnecessary conductors.

Applications

„„ Laboratory technology
„„ Calibration technology
„„ Tolerance class A or AA
„„ Connecting cables up to 1,000 m

Dual sensors
In the standard version a single sensor is fitted.
The combination of black and yellow is reserved for an
optional second measuring resistor. For certain combinations
(e.g. small diameter) dual sensors are not possible for
technical reasons.

21
Thermocouples
„„ Thermocouples generate a voltage directly dependent on
temperature. Suited to the corresponding measurement
temperature, you can choose from a variety of thermo-
couple models.

„„ Thermocouples are particularly suited for high tempera-

tures (up to 1,600 °C). Instrument designs from mineral-
insulated sheathed cable are very resistant against
extremely high vibration loads (depending on instrument
model, sensor element and wetted materials).

Information on the application of thermocouples

„„ Type K „„ Type B
NiCr-Ni thermocouples are suitable for continuous use Pt-30%Rh/Pt-6%Rh thermocouples are suitable for
in oxidising or inert gas atmospheres up to 1,200 °C with continuous use in oxidising or inert gas atmospheres and
the largest wire thickness. They must be protected from for short-term use in vacuum environments (applications)
sulphurous atmospheres. Since they are less susceptible for temperatures up to 1,700 °C.
to oxidation than thermocouples made of other materials,
they are mostly used for applications at temperatures Type S, R or B thermocouples can be inserted into metallic
above 550 °C up to the maximum working pressure of the thermowells only if a very clean sleeve, with sealed ceramic
thermocouple. ends, is used. Care must be taken over embrittlement
„„ Type N through contamination. Higher stability at high temperatures
NiCrSi-NiSi thermocouples are suitable for use in than types N or K.
oxidising atmospheres, in inert gas atmospheres or dry
reduction atmospheres up to 1,200 °C. They must be For thermocouples, the accuracy classes and tolerance
protected from sulphurous atmospheres. They are very values per DIN EN 60584 or ISA (ANSI) MC96.1 apply.
accurate at high temperatures. The source voltage (EMF)
and the range are almost the same as with type K. They
are used in applications where a longer service life and
greater stability are required.
„„ Type J
Fe-CuNi thermocouples are suitable for use in vacuum, in
oxidising and reducing atmospheres or inert gas atmos-
pheres. They are used for temperature measurements up
to 760 °C with the largest wire size.
„„ Type E
NiCr-CuNi thermocouples are suitable for use in oxidising Thermocouple characteristics for
or inert gas atmospheres up to 900 °C with the largest thermocouples from base metal per
wire thickness. Type E thermocouples, of all the generally DIN EN 60584 (IEC 60584)
used thermocouples, develop the highest source voltage
(EMF) per degree.
„„ Type T 90
Spannung (mV)

Cu-CuNi thermocouples are suitable for temperatures 80 E

below zero with an upper temperature limit of 350 °C and 70

J

can be used in oxidising, reducing and inert gas atmos- 60 K

pheres. They do not corrode in moist atmospheres. 50

„„ Type R 40
N

Pt-10%Rh/Pt thermocouples are suitable for continuous 30

use in oxidising or inert gas atmospheres for tempera- 20

T
tures up to 1,600 °C. 10
„„ Type R
0
Pt-13%Rh/Pt thermocouples are suitable for continuous –300 –200 –100 0 100 200 300 400 500 600 700 800 900 1000 1100 1200 1300 1400 1500

use in oxidising or inert gas atmospheres for tempera-

–10
Temperatur (°C)

tures up to 1,600 °C.

–20

22
 Technical information

Tolerance value classes for thermocouples

(cold junction temperature 0 °C)
Tolerance value classes (DIN EN 60584-2 / IEC 60584-2)

Type Class 1 Class 2 Class 3

Temperature range -40 ... +375 °C +40 ... +333 °C -167 ... +40 °C
Tolerance value ±1.5 °C ±2.5 °C ±2.5 °C
K, N
Temperature range +375 ... +1,000 °C +333 ... +1,200 °C -200 ... -167 °C
Tolerance value ±0.004 |t| ±0.0075 |t| ±0.015 |t|

Temperature range -40 ... 375 °C -40 ... +333 °C -

Tolerance value ±1.5 °C ±2.5 °C -
J
Temperature range +375 ... +750 °C +333 ... +750 °C -

Tolerance value ±0.004 |t| ±0.0075 |t| -

Temperature range -40 ... +375 °C -40 ... +333 °C -167 ... +40 °C
Tolerance value ±1.5 °C ±2.5 °C ±2.5 °C
E
Temperature range +375 ... +800 °C +333 ... +900 °C -200 ... -167 °C
Tolerance value ±0.004 |t| ±0.0075 |t| ±0.015 |t|

Temperature range -40 ... +125 °C -40 ... +133 °C -67 ... +40 °C
Tolerance value ±0.5 °C ±1.0 °C ±1.0 °C
T
Temperature range +125 ... +350 °C +133 ... +350 °C -200 ... -67 °C
Tolerance value ±0.004 |t| ±0.0075 |t| ±0.015 |t|

Temperature range 0 ... +1,100 °C 0 ... +600 °C -

Tolerance value ±1.0 °C ±1.5 °C -
R, S
Temperature range +1,100 ... +1,600 °C +600 ... +1,600 °C -
Tolerance value ±[1 + 0.003 (t-1,100)] ±0.0025 |t| -

Temperature range - - +600 ... +800 °C

Tolerance value - - +4.0 °C
B
Temperature range - +600 ... +1,700 °C +800 ... +1,700 °C
Tolerance value - ±0.0025 |t| +0.005 |t|

ASTM tolerance values (ASTM E230)

Type Standard (whichever value is greater) Special (whichever value is greater)

Temperature range 0 ... +1,260 °C +32 ... +2,300 °F 0 ... +1,260 °C +32 ... +2,300 °F
Tolerance value ±2.2 °C or ±0.75 % ±4.0 °F or ±0.75 % ±1.1 °C or ±0.4 % ±2.0 °F or ±0.4 %
K
Temperature range -200 ... 0 °C -328 ... 32 °F - -
Tolerance value ±2.2 °C or ±2.0 % ±4.0 °F or ±2.0 % - -

Temperature range 0 ... +1,260 °C +32 ... +2,300 °F 0 ... +1,260 °C +32 ... +2,300 °F
N
Tolerance value ±2.2 °C or ±0.75 % ±4.0 °F or ±0.75 % ±1.1 °C or ±0.4 % ±2.0 °F or ±0.4 %

Temperature range 0 ... +760 °C +32 ... +1,400 °F 0 ... +760 °C +32 ... +1,400 °F
J
Tolerance value ±2.2 °C or ±0.75 % ±4.0 °F or ±0.75 % ±1.1 °C or 0.4 % ±2.0 °F or 0.4 %

Temperature range 0 ... +870 °C +32 ... +1,600 °F 0 ... +870 °C +32 ... +1,600 °F
Tolerance value ±1.7 °C or ±0.5 % ±3.1 °F or ±0.5 % ±1.0 °C or ±0.4 % ±1.8 °F or ±0.4 %
E
Temperature range -200 ... 0 °C -328 ... 32 °F - -
Tolerance value ±1.7 °C or ±1.0 % ±3.1 °F or ±1.0 % - -

Temperature range 0 ... +370 °C +32 ... +700 °F 0 ... +370 °C +32 ... +700 °F
Tolerance value ±1 °C or ±0.75 % ±1.8 °F or ±0.75 % ±0.5 °C or 0.4 % ±0.9 or 0.4 %
T
Temperature range -200 ... 0 °C -328 ... 32 °F - -
Tolerance value ±1.0 °C or ±1.5 % ±1.8 °F or ±1.5 % - -

Temperature range 0 ... +1,480 °C +32 ... +2,700 °F 0 ... +1,480 °C +32 ... +2,700 °F
R, S
Tolerance value ±1.5 °C or ±0.25 % ±2.7 °F or ±0.25 % ±0.6 °C or ±0.1 % ±1.1 °F or ±0.1 %

Temperature range +870 ... 1,700 °C +1,600 ... +3,100 °F +870 ... 1,700 °C +1,600 ... +3,100 °F
B
Tolerance value ±0.5 % ±0.5 % ±0.25 % ±0.25 %

23
Thermocouple and extension wire colour codes

ASTM E230 ASTM E230 BS 1843 DIN 43714 ISC1610-198 NF C42-323 IEC 60584-3 IEC 60584-3
Thermocouple Compensating intrinsic safety
wire cable

24
 Technical information

Thermowells

WIKA thermowells are available both in solid-machined and A full-penetration weld seam guarantees a complete joining
fabricated designs. The variants offered include designs with of the flange and the thermowell, and thus the strongest
flanges, with threads and for welding. Furthermore, thermo- welded joint. The double fillet weld offers a good alternative
wells are available in Vanstone design and with connections with its excellent stability.
for sanitary applications for fixing by means of a lapped
clamping flange. The choice of material and manufacturing Thermowells in thread-welded design consist of a thermowell
to customer requirements ensures optimal protection of the with a 1-NPT thread, which is screwed into a threaded flange.
sensor and precise measurements. Thermowells with flanges In addition, the thermowell is secured on one or both sides by
can be manufactured with double fillet weld, penetration weld a weld seam.
or in threaded weld designs.

Welding options

Weld seam Weld seam Weld seam

Flange Flange
Flange

1 NPT

Thermowell Thermowell Thermowell

Full penetration weld design Fillet weld, double-sided Screwed and welded design

Flange disc option for special materials

The design with a flange disc is available for solid-machined
or fabricated flanged thermowells. In this design, the flange Weld seam

Flange from stainless steel

disc material is matched to the material of the thermowell
shaft; the non-wetted flange is manufactured from stainless
steel. The flange disc is welded to the thermowell and the
stainless steel flange, so that all the parts form a single unit.
After welding, the sealing face of the flange disc is turned to
the required surface roughness. Weld seam Flange disc from special material

Thermowell
The flange disc design is used when chemically aggressive
process media require the use of special materials, while the
flange, for cost considerations, can be manufactured from
stainless steel. Note: The main advantage of this design is the cost saving
Normally 316/316L stainless steel is used as flange material. over a complete construction from special materials.
The weld seam used is a double fillet weld between all However, due to the design, an air gap exists between the
components. stainless steel flange and the flange disc, which could be
detrimental in critical processes.

25
Flange sealing faces on thermowells

For flanges in accordance with the standards ASME B16.5, Less common in thermowells are flanges with smooth sealing
EN 1092-1 and DIN 2527 there are different sealing face faces without detectable grooves or designs with concentric,
forms and surface finishes in use. The most commonly-used continuous grooves.
sealing face of all the standards is the version with offset
raised face with spiral phonographic grooves in the sealing
face. The form and depth of the grooves is defined in the
corresponding flange standards.

Flange form

Standard flange sealing faces to ASME B16.5

AARH (µinch) Ra (µm)

Stock finish 125 ... 250 3.2 ... 6.3

Smooth finish < 125 < 3.2

RTJ (Ring joint groove) < 63 < 1.6

Tongue/groove < 125 < 3.2

Standard flange sealing faces to DIN 2527

Ra (µm) Rz (µm)

Form C - 40 ... 160

Form E - < 16

Standard flange sealing faces to EN 1092-1

Ra (µm) Rz (µm)

Form B1 3.2 ... 12.5 12.5 ... 50

Form B2 0.8 ... 3.2 3.2 ... 12.5

Calculation of the thermowell

strength to ASME PTC 19.3
TW-2010
To assist in the design of the thermowell, a separate
spreadsheet is provided. This enables the dimensions to be
determined for tapered, straight and stepped thermowells
on which the process medium flow in the pipeline causes
vibration or stress. Invalid value inputs or results that are
outside the permissible limits can thus be identified. The
calculation includes a wide range of standard and special
materials.

26
 Technical information

Non-destructive test/evaluation

NDE or NDT Helium leak test

NDE/NDT are abbreviations for “Non-Destructive For leak testing in accordance with DIN EN 1779 (1999)/
Examination”/“Non-Destructive Testing”. EN 13185, helium 4.6 is used as a test gas. The test is able
The abbreviations NDE or NDT stand for “Non-Destructive to detect minimal leakage rates and is considered the most
Examination” or “Non-Destructive Testing”, respectively. This sensitive test method for leak testing. In general, one should
is used to refer to non-destructive inspections or tests of distinguish between an integral and local test method. In
components, in general. the integral test, leak rates (e.g. 1x10-7 mbar * l / s) can
be determined, while the local testing enables the location
Liquid penetrant inspection of the leak to be determined using a spray probe. After
With the penetrant test in accordance with DIN EN 571-1, passing a helium leak test, the thermowell is marked with a
fine surface cracks and porosities in weld seams can be corresponding sticker.
made visible. After cleaning the surface to be inspected, a
contrast agent (red or fluorescent) is sprayed on. Through Ultrasonic test
the capillary effect, this agent penetrates any surface defects Through an ultrasonic test in accordance with DIN EN
there might be. After re-cleaning the surface, a developer ISO 17640, for example, full penetration weld seams on
(white) is then sprayed on, which extracts the contrast agent thermowells can be investigated with respect to irregularities
(from any hairline cracks, etc.) and through colour contrast, (cracks, voids, insufficient bonding). For this, the reflections
enables an easy evaluation of the defects. After passing a of a radiated ultrasound signal are measured at the interfaces
liquid penetration test, the thermowell is marked with “PT”. of irregularities. To determine the position of the irregularities,
the ultrasonic device is adjusted beforehand by means of
X-ray testing a reference body. The ultrasonic test can also be used to
Through an X-ray test to EN 1435 or ASME Section V, Article measure the wall thicknesses of a thermowell from solid body
2, Edition 2004, for example, full penetration welds on material to determine the bore centrality.
thermowells can be investigated with respect to irregularities
(cracks, voids, insufficient bonding). Here, depending on the Positive material identification test (PMI)
dimensions of the thermowell, up to five X-ray images may The PMI (positive material identification) test proves
be necessary to determine irregularities with sizes < 0.5 mm which alloy constituents exist in the material. There are
in the full-penetration weld. An X-ray examination can also various common test procedures. With optical emission
be used to record the bore centrality in solid body material spectroscopy (OES) in accordance with DIN 51008-1 and
thermowells. For this purpose, two images of the thermowell -2, an arc is generated between the thermowell surface and
tip at 90° to each other are required. the test equipment, and the spectrum of this arc enables
the alloy’s elements to be identified – both qualitatively and
Pressure and stability tests quantitatively. This process does leave a characteristic burn
The hydrostatic pressure test is a pressure and stability test mark on the workpiece. A test procedure which doesn’t
of the components of a thermowell following AD 2000 code damage the surface is the X-ray analysis in accordance with
of practice HP30. For the test, the thermowell is clamped into DIN 51001; during the X-ray the atoms of the thermowell
a testing device and subjected to a defined test pressure material are energised until they radiate themselves. The
at room temperature for a certain period of time (e.g. three wavelength and intensity of the emitted radiation is again
minutes). In general, a distinction is made between the a measure of the alloy’s constituent elements and their
outside and inside pressure test. A typical pressure is 1.5 concentrations. After passing a positive material identification
times the nominal pressure of the flange as outside pressure test (PMI), the thermowell is marked with “PMI”.
or 500 bar as inside pressure. After passing a hydrostatic
pressure test, the thermowell is marked with “P”.

27
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