Euro gauge

Safety pattern type pressure gauge A

Model : PN257 series
Spec. sheet no. PN02-06

Service intended
PN257 series are made with a solid plate wall and a
blow-out back. Its stainless steel case and cover have a
good appearance. It has the excellent proof against
corrosion and chemical attack.

Nominal diameter
63, 100 and 160 mm
Accuracy
PN2572 (63 mm) : ±1.6 % of full scale
PN2574 (100 mm) and P2576 (160 mm) : ±0.5 % of full scale
±1.0 % of full scale
Scale range (MPa, kPa, bar)
63 mm : -0.1 ~ 0 to 0 ~ 100 MPa
100 and 160 mm : -0.1 ~ 0 to 0 ~ 200 MPa
Working pressure
Steady : 75 % of full scale (63 mm)
100 % of full scale (100 and 160 mm)
Over range protection : 130 % of full scale
Working temperature
Ambient : -40 ~ 65 ℃
-20 ~ 65 ℃ (With glycerin filling)
-40 ~ 65 ℃ (With silicone filling)
Fluid : Max. 200 ℃
Max. 100 °C (With glycerin filling)
Max. 100 ℃ (With silicone filling)
Degree of protection
EN60529/IEC529/IP67
Temperature effect
Accuracy at temperature above and below the reference
temperature (20 ℃) will be effected by approximately
±0.4 % per 10 ℃ of full scale

Standard features
Pressure connection Movement
Stainless steel (316SS) Stainless steel

Element Dial
Stainless steel (316SS) White aluminium with black graduations
63 mm : <6 MPa : C type bourdon tube
≥6 MPa : Helical type bourdon tube
Pointer
100 and 160 mm : <10 MPa : C type bourdon tube Black painted aluminium alloy
≥10 MPa : Helical type bourdon tube Process connection
Case 63 mm : ⅛", ¼" PT, NPT and PF
Stainless steel (304SS) 100 and 160 mm : ¼", ½", ⅜" PT, NPT and PF
Cover Certificates
Stainless steel (304SS) ATEX Ex II GD c IIc TX
Bayonet type Pressure equipment directive (2014/68/EU)-Annex III Module H
Blowout protection
Solid front Option
Blow-out back Zero adjustable pointer
Window (Only available with diameter 100 and 160 mm)
Laminated safety glass Zero adjustment (External) : 100 and 160 mm
Pressure connection and element : Monel
(Only available with diameter 100 and 160 mm)
PN257_01
 Main order Ordering information
1. Base model 9. Pressure connection material dial color
PN257 Safety pattern type pressure gauge 3 316SS and 2 colors
4 316L SS and 2 colors
2. Nominal diameter (mm) 7 316SS and 3 colors

2 63 8 316L SS and 3 colors

4 100 Z Monel

6 160
10. Option
3. Type of mounting 0 None
A Bottom connection, direct 1 Accessories
C Bottom connection, surface, cover mounting plate, 8 Silicone filling
not available with diameter 63 mm 9 Glycerin filling
G Lower back connection, direct, not available with
diameter 160 mm
M Lower back connection, flush, case center mounting
bracket, not available with diameter 160 mm
N Lower back connection, flush, cover mounting plate,
not available with diameter 160 mm

4. Accuracy
2 ±0.5 % of full scale. not available with diameter 63 mm,
not available with range 0.4 and 0.5 bar
3 ±1.0 % of full scale. not available with diameter 63 mm
4 ±1.6 % of full scale. only available with diameter 63 mm

5. Process connection
B ⅛"
C ¼"
D ⅜", not available with diameter 63 mm
E ½", not available with diameter 63 mm

6. Connection type
B PF
C PT
D NPT
F BSPT
G BSP(G)

7. Unit
H bar
I MPa
J kPa
Z Other

8. Range
XXX Refer to pressure unit and range table

1 2 3 4 5 6 7 8 9 10
Sample
PN257 4 A 3 C D H XXX 3 9 ordering code

PN257_02
PN257 : Type of mounting

D E F M
Dial size Available code A B C G H Q
S.T.D External S.T.D External S.T.D External S.T.D External
A 64 62 42.5 - 61 - 17.2 -
G 64 62 42.5 - 70 - 16.7 -
63
M 64 62 68 42.5 - 70 - 16.7 - 34 - 75 M3X0.5
N 64 66 68 42.5 - 70 - 16.7 - 36.5 - 75
A 101.3 99 59 61 88 25.5 27.5
C 101.3 103.1 130.5 59 61 88 25.5 27.5 53.5 55.5 116 28
100 G 101.3 99 59 61 98.5 100.5 29
M 101.3 99 108 59 61 98.5 100.5 29 48 50 116 M4X0.7
N 101.3 103.1 130.5 59 61 98.5 100.5 29 53.5 55.5 116 28
A 160.8 159.6 62 113 113 25.6
160
C 160.8 164 196 62 - 113 - 25.6 - 57 - 178 18

PN257_03
 Pressure unit and range table

Unit and code Nominal diameter

Range and code
H : bar I : MPa J : kPa 63 mm 100 mm 160 mm
026 -1 ~ 0 -0.1 ~ 0 -100 ~ 0 O O O
123 0 ~ 0.4 0 ~ 0.04 0 ~ 40 X O Δ
040 0 ~ 0.5 0 ~ 0.05 0 ~ 50 X O Δ
041 0~1 0 ~ 0.1 0 ~ 100 O O O
133 0 ~ 1.6 0 ~ 0.16 0 ~ 160 X O O
042 0~2 0 ~ 0.2 0 ~ 200 O O O
134 0 ~ 2.5 0 ~ 0.25 0 ~ 250 X O O
043 0~3 0 ~ 0.3 0 ~ 300 O O O
044 0~4 0 ~ 0.4 0 ~ 400 O O O
045 0~6 0 ~ 0.6 0 ~ 600 O O O
047 0 ~ 10 0~1 X O O O
050 0 ~ 15 0 ~ 1.5 X O O O
143 0 ~ 16 0 ~ 1.6 X O O O
051 0 ~ 20 0~2 X O O O
052 0 ~ 25 0 ~ 2.5 X O O O
054 0 ~ 35 0 ~ 3.5 X O O O
151 0 ~ 40 0~4 X O O O
055 0 ~ 50 0~5 X O O O
056 0 ~ 60 0~6 X O O O
057 0 ~ 70 0~7 X O O O
058 0 ~ 100 0 ~ 10 X O O O
059 0 ~ 150 0 ~ 15 X O O O
060 0 ~ 160 0 ~ 16 X O O O
062 0 ~ 250 0 ~ 25 X O O O
064 0 ~ 350 0 ~ 35 X O O O
065 0 ~ 400 0 ~ 40 X O O O
066 0 ~ 500 0 ~ 50 X O O O
067 0 ~ 600 0 ~ 60 X O O O
068 0 ~ 700 0 ~ 70 X O O O
070 0 ~ 1,000 0 ~ 100 X O O O
074 0 ~ 1,600 0 ~ 160 X X O O
075 0 ~ 2,000 0 ~ 200 X X O O
006 -1 ~ 0.6 -0.1 ~ 0.06 -100 ~ 60 X O O
027 -1 ~ 1 -0.1 ~ 0.1 -100 ~ 100 O O O
007 -1 ~ 1.5 -0.1 ~ 0.15 -100 ~ 150 X O O
028 -1 ~ 2 -0.1 ~ 0.2 -100 ~ 200 O O O
029 -1 ~ 3 -0.1 ~ 0.3 -100 ~ 300 O O O
030 -1 ~ 4 -0.1 ~ 0.4 -100 ~ 400 O O O
010 -1 ~ 5 -0.1 ~ 0.5 -100 ~ 500 O O O
031 -1 ~ 6 -0.1 ~ 0.6 -100 ~ 600 O O O
014 -1 ~ 9 -0.1 ~ 0.9 -100 ~ 900 O O O
032 -1 ~ 10 -0.1 ~ 1 -100 ~ 1,000 O O O
033 -1 ~ 15 -0.1 ~ 1.5 -100 ~ 1.5 MPa O O O
034 -1 ~ 20 -0.1 ~ 2 -100 ~ 2 MPa O O O
017 -1 ~ 24 -0.1 ~ 2.4 -100 ~ 2.4 MPa O O O
035 -1 ~ 25 -0.1 ~ 2.5 -100 ~ 2.5 MPa O O O
O : Available X : Not available Δ : Not available with ±0.5 % of full scale

PN257_04