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Pressure switch 901 Prescal® EX

Introducing the Adjustable Pressure Switch: Easily monitor overpressure, vacuum, or differential pressure for all media types. Customise trip and reset pressures effortlessly with a scaled adjustment knob—no tools needed. Ideal for various applications, our switch offers simple setup and precise customisation via the Product Configurator. Simplify your pressure monitoring tasks with this versatile solution.

Pressure Switch 901 Product Parameters

  • Pressure Ranges: Factory-set for overpressure, vacuum, or differential pressure.
  • Output Signal: Depends on electrical connection; max 100 mA / 24 VAC, 30 mA / 24 VDC.
  • Accuracy: Factory-set with tolerances as per specific models.
  • Electrical Connections: Tab terminal 6.3 mm x 0.8 mm or push-on screw terminals.
  • Process Connections: Variety of tube and threaded connections available.
  • Media Compatibility: Suitable for liquid and gaseous media, including aggressive types.
  • Special Features: IP54/IP65 protection, ATEX certification, and various accessories for customization.

Product Highlights

The Pressure switch 901 Prescal® EX is a versatile and reliable instrument designed to measure and control pressure in various applications. Available in different types with a wide setting range, the switch caters to diverse pressure requirements. Its standard/extended models offer setting ranges between 5 and 20 mbar up to 1,000 and 3,000 mbar, while the maximum positive working pressure ranges from 0.5/4 bar to 10 bar. The device also features a temperature range from -20°C to 85°C for media and ambient temperatures, ensuring effective operation in various environments. The diaphragm material is customisable, with options like NBR, Silicone, FKM (Viton®), and EPDM depending on the media. The Pressure switch 901 Prescal® EX comes with multiple pressure connection choices, including PA, PVDF, PPS, Brass, and Stainless Steel materials, and various hose nipple and thread options. Its electrical rating is 24 VDC/100 mA or 30 VDC/45 mA, and it can be connected through AMP flat plug 6.3 x 0.8 mm or push-on screw terminals. With an IP 54 protection class (with cover 6371), this pressure switch guarantees durability and performance in demanding industrial settings.


  • Wastewater technology
  • Liquid level measurement
  • Pump control
  • Medical technology
To download the latest datasheet click here: Pressure switch 901 Prescal® EX

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