Model MA

Diaphragm pressure switch

Ex protection Ex-d, IP 65

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  • Pressure monitoring and direct switching of electrical loads
  • For measuring points with increased overpressure
  • For gaseous and liquid, aggressive and highly viscous or contaminated media, also in aggressive ambience
  • Process industry: Chemical/petrochemical, on- and offshore, technical gases, environmental technology, machine building and general plant construction, water treatment, pharmaceutical industry

Special Features

  • Case flameproof enclosure
  • Ingress protection IP 65, NEMA 4
  • Ambient temperature -40 ... +85 °C
  • 1 or 2 independent switch points, high contact rating up to 15 A / AC 220 V
  • Setting ranges from 200 mbar, max. test pressure up to 40 bar


These high-quality pressure switches have been developed especially for safety-critical applications. The high quality of the products ensures reliable monitoring of your plant. The manufacturer Cella is certified to ISO 9001. In production, the switches are traced by quality assurance software at every step and subsequently are 100 % tested.

All wetted materials are made from stainless steel as a standard. Each switch family is available in IP65, Ex-ia or Ex-d versions.

In order to ensure as flexible operation as possible, the pressure switches are equipped with micro switches, which make it possible to switch an electrical load of up to 15 A / AC 220 V directly.

For smaller contact ratings, such as for PLC applications, Argon gas-filled micro switches with gold-plated contacts can be selected as an option.

By using a diaphragm measuring system, the model MA1 pressure switch is extremely robust and guarantees optimal operating characteristics. For applications requiring particularly high corrosion protection, variants with PTFE or Monel wetted parts are available.

Diaphragm pressure switch
  • Diaphragm pressure switch
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