433.50 WIKA industrial diaphragm pressure gauge


Šifra: MAN-433.50

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Dobavni rok: 14 days

  • scale from 0… 16 mbar
  • wide choice of special materials
  • stainless steel housing and wetted parts
  • process the connection thread or open flange
  • high overload protection up to 10 times full scale



The 433.50 WIKA industrial diaphragm manometer is preferably used for low pressure areas. Through the large working area of the circular, corrugated diaphragm element, small pressure ranges can be reliably measured.

The 432.50 diaphragm pressure gauge is manufactured in accordance with EN 837-3. The high-quality design makes it particularly suitable for use in the chemical, petrochemical, oil and gas and power industries.
The stainless steel housing and wet parts meet the high requirements for resistance to aggressive media. For particularly high resistance requirements, the pressure chamber of this diaphragm pressure gauge can optionally be manufactured with a wide range of special materials such as PTFE, tantalum or Hastelloy.

For low pressure areas, diaphragm manometers are preferred. Small pressure ranges can be reliably measured through the large working area of the circular corrugated diaphragm element.

For the measurement of highly viscous, crystallising or contaminated media, the use of an open connecting flange is recommended. An open connection flange is preferred over a threaded connection because the pressure connection cannot be blocked. The pressure chamber can be easily cleaned with an additional flushing connection on the open connection flange.

Metering systems with diaphragm elements offer good overpressure protection due to their design, as the diaphragm support can rest on the top flange. The 432.50 membrane model is already equipped with overload protection as standard, which is 5 times the full value. Higher overload protection can be achieved if desired.


Features 433.50

  • Design: EN 837-3
  • Nominal size in mm: 100, 160
  • Accuracy class: 1.6
  • Scale range
    • 0 … 16 mbar to 0 … 250 mbar (flange Ø 160 mm)
    • 0 … 400 mbar to 0 … 25 bar (flange Ø 100 mm)
    • or any other equivalent vacuum or combined pressure; and
    • vacuum zones
  • Pressure limit
    • Continuous: full scale value
    • Niha: 0.9 x total scale value
  • Overload safety: 3 x full scale value, up to a maximum of 40 bar
  • Allowable temperature:
    • Environment: -20 °C … +60 °C
    • medium: maximum +100 °C
    • Storage: -40 °C … +70 °C
    • (range ≤ 60 mbar: -20 °C … +70 °C)
  • Temperature effect: when the temperature of the measuring system deviates from the reference temperature (+20 °C): max. ± 0.3 % / 10 K range
  • Ingress protection according to IEC/EN 60529: Model 433.50: IP65 (with liquid filling)
  • Process connection with bottom measuring flange: stainless steel 316L, G ½ B (male), SW 22
  • Pressure element:
    • ≤ 0.25 bar: 316L stainless steel
    • > 0.25 bar: NiCr alloy (Inconel)
  • Pressure chamber sealing: FPM/FKM
  • Movement: stainless steel
  • Dial: aluminium, white, black letters
  • Pointer: aluminium, black


Areas of use, applications

  • for measuring points with increased overload
  • for gaseous, liquid and aggressive media, also in aggressive environments
  • with the option of open connection flange also for contaminated and viscous media
  • with fluid-filled housing suitable for high dynamic pressure loads and vibrations (model 433.50)
  • Process industries: chemical, petrochemical, power plants, mining, offshore, environmental, environmental technology, mechanical engineering and general plant construction


To view additional options and more technical features, we recommend viewing the attached pdfs. documents under the Documentation section.

ELPRO designation: MAN-433.50


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