Wika Models 432.50, 433.50 Diaphragm pressure gauge

Applications of the diaphragm pressure gauge

  • For measuring points with increased overpressure
  • With liquid-filled case for applications with high dynamic pressure loads or vibrations (Model 433.50)
  • For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive ambience
  • Process industry: Chemical/petro-chemical, power stations, mining, on- and offshore, environmental technology, machine building and general plant construction

Special Features of the diaphragm pressure gauge

  • All stainless steel construction
  • High overpressure safety
  • Process connection thread or open flange
  • Wide choice of special materials
  • Scale ranges from 0 … 16 mbar


Description of the diaphragm pressure gauge

EN 837-3

Nominal size in mm
100, 160

Accuracy class

Scale ranges
0 ... 16 mbar to 0 ... 250 mbar (flange Ø 160 mm)
0 ... 400 mbar to 0 ... 25 bar (flange Ø 100 mm)
or all other equivalent vacuum or combined pressure and vacuum ranges

Pressure limitation
Steady: Full scale value
Fluctuating: 0.9 x full scale value

Overpressure safety
5 x full scale value, however max. 40 bar

Permissible temperature
Ambient: -20 ... +60 °C
Medium: +100 °C maximum
Storage: -40 … +70 °C (scale ranges ≤60 mbar: -20 ... +70 °C)

Temperature effect
When the temperature of the measuring system deviates from the reference temperature (+20 °C):
max. ±0.8 %/10 K of full scale value

Ingress protection
IP54 per IEC/EN 60529
(with liquid filling Model 433.50) IP65)


Process Connection
Nominal diameter
Scale range
Manometer diameter
Brand Wika
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