WIKA MH-4, Operating Instructions Manual, Page: 18 / 92

18 WIKA operating instructions pressure sensor, model MH-4
14170805.01 06/2020 EN/DE/FR/ES
EN
Process connections
Standard Thread size Max. nominal
pressure
Sealing and temperature
range
Standard
Option
ISO 1179-2
(formerly
DIN 3852-E)
G ¼ A 600 bar [8,700 psi] NBR
-40 … +100 °C
[-40 … +212 °F]
FPM/FKM
-20 … +125 °C
[-4 … +257 °F]
ISO 9974-2
(formerly
DIN 3852-E)
M14 x 1.5 600 bar [8,700 psi]
ISO 6149-2 M14 x 1.5 600 bar [8,700 psi]
JIS B2351-1 G ¼ x 10, form O
with collar
600 bar [8,700 psi] NBR
-40 … +100 °C
[-40 … +212 °F]
FPM/FKM
-20 … +125 °C
[-4 … +257 °F]
G ⅜, form O with
collar
600 bar [8,700 psi]
SAE J514 7/16-20 UNF-2A,
O-ring BOSS
600 bar [8,700 psi]
9/16-18 UNF-2A,
O-ring BOSS
600 bar [8,700 psi]
3/4-16 UNF-2A,
O-ring BOSS
600 bar [8,700 psi]
7/16-20 UNF-2A,
sealing cone 74°
800 bar [11,600 psi] - -
ANSI/ASME
B1.20.1
⅛ NPT 400 bar [5,800 psi]
¼ NPT 1,000 bar [14,500 psi]
KS PT ¼ 1,000 bar [14,500 psi]
PT ⅜ 1,000 bar [14,500 psi]
ISO 7 R ¼ 1,000 bar [14,500 psi]
R ⅜ 1,000 bar [14,500 psi]
EN 837 G ⅛ B 400 bar [5,800 psi] Copper
-40 ... +125 °C
[-40 ... +257 °F]
Stainless steel
-40 ... +125 °C
[-40 ... +257 °F]
G ¼ B 1,000 bar [14,500 psi]
G ⅜ B 1,000 bar [14,500 psi]
Details must be tested separately in the respective application. The specified values for the max. nominal
pressure serve only as a coarse orientation. The values depend on the temperature, the seals used, the selected
torque, the type and the material of the mating thread and the prevailing operating conditions.
9. Specifications