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Adjustable pressure switches ATEX/CSA type 131P/231P


High voltage electromechanical adjustable pressure switch (max 250 Volt) ATEX. SPDT or DPDT contacts. Sealed electrical connection with free lead. Electrical protection with conduit box cap supplied separately. NPT Threaded electrical and process connections.



  1. 131P Range: 0,1 ÷ 14,9 bar increasing (see product details)
  2.                       0,7 ÷ 13,8 bar decreasing (see products details)
  3. 231P Range: 23 ÷ 690 bar increasing  (see product details)
  4.                       17 ÷ 621 50 bar decreasing  (see product details)
  5. Max. pressure: 69 bar diaphragm, 276 ÷ 862 bar piston
  6. Deadband: Fixed
  7. Electrical contacts: SPDT or DPDT
  8. Electrical connection: NPT threaded with sealed free leads
  9. Max. fluid temperaturea: -40°C ... +300°C
  10. Body and Connection materials: Aluminum or SS316
  11. Diaphragm/piston Materials: Alluminum or SS316
  12. Process connections: Threaded NPT
  13. Other options: See product details



Read the data sheet for the standard options available for materials and process connections.
Other possible executions based on customer requests for quantities

  • Pressure switches
  • calibrated up to the value indicated by the customer
  • Pressure switches calibrated in descent to the value
  • indicated by the customer
  • Various options available for Oil & Gas applications and hazardous areas


The pressure switch must be installed preferably in a vertical position with electrical connection upwards. The pressure switch can be damaged in the presence of impacts and high vibrations creating false contacts. Pressure switches have sealed electrical output and outgoing wires, can and connectors and a Corten type cassette. As available options made pressure switches with body in acc. stainless steel, degreased for use with oxygen or gold-plated contacts for low currents. Our technical office is available for the most suitable solution for your applications. Particular attention to the external environment in which the pressure switches are installed. These pressure switches are manufactured and certified (ATEX, FM, CSA) to work in environments where there is a flammable atmosphere due to the presence of gas or other contaminations that make the use dangerous. Our technical office is available to recommend the most suitable solution.


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