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Fischer Differential Pressure Switch

The DS21 is a measuring and switch unit for measuring differential pressure under difficult measuring conditions such as: pressure surges, vibrations, frequent switching and high demands on the switching output. Please contact the manufacturer before using this unit with dirty or aggressive media because the unit needs to be adapted in terms of the parts that come into contact with the media.

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Input variables

Measuring：variable Differential, over and under-pressure for gaseous and fluid media.

Measurement range:

Measurement range Allowed static operating pressure
0 … 250 mbar 6 bar
0 … 400 mbar 6 bar
0 … 0.6 bar 10 bar
0 … 1 bar 16 bar
0…1.6 bar 16 bar
0…2.5 bar 16 bar
0 … 4 bar 16 bar
0 … 6 bar 16 bar

 

Rated pressure of the measuring system：25 bar

Max. pressure load：Over-pressure-proof on one side up to rated pressure of the measuring system,(+) and (-) sides, under-pressure-proof

Application conditions

Allowed ambient temperatures -10 °C … +70 °C
Allowed temperature of the medium -10 °C … +85 °C *)
Enclosure protection class
(depending on model)		 IP 55 or IP 65 in compliance with DIN EN 60529

*) The temperature in the unit may not exceed +70 °C.

Materials

Pressure chamber：

  • Aluminium Gk-AlSi10Mg, painted black
  • Aluminium Gk-AlSi10MG with HART-COAT©
  • Surface protection
  • CrNi steel 1.4305

Measuring diaphragm：Fabric-reinforced VITON®

Gaskets：VITON®

Inner parts in contact with the medium：CrNi-steel 1.4310, 1.4305

Hood：Polycarbonate (PC) Makrolon®

Bayonet ring：CrNi-Steel 1.4305

Front pane：Safety laminated glass

Fischer Differential Pressure Switch Fischer Differential Pressure Switch Fischer Differential Pressure Switch

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