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901 Prescal…Ex® ATEX Adjustable Pressure switch

Introducing our innovative Adjustable Pressure Switch – your ultimate solution for monitoring overpressure, vacuum, or differential pressure of various liquids and gases, including aggressive media. With its user-friendly scaled adjustment knob, you can easily set trip and reset pressure without the hassle of a screwdriver. Whether it’s industrial or commercial applications, this pressure switch is your reliable partner. Check out the technical data and explore the product configurator to customise your perfect fit. Trust in our top-notch engineering for precision and efficiency. Improve safety and control with our Adjustable Pressure Switch today!

901 Adjustable Pressure Switch Product Parameters

  • Pressure Ranges: Factory-set 5 mbar to 12 bar, vacuum and differential options
  • Output Signal: Max 100 mA / 24 VAC, 30 mA / 24 VDC
  • Accuracy: ±10% tolerance band of trip pressure
  • Electrical Connections: Tab terminal 6.3 mm x 0.8 mm or screw terminals
  • Process Connections: Various tube and threaded connections available
  • Media Compatibility: NBR, Silicone, FKM, EPDM diaphragms for aggressive media
  • Special Features: ATEX certified, IP54/IP65, life >106 cycles, damping restrictors

Product Highlights

The 901 Prescal…Ex® ATEX Adjustable Pressure switch offers versatile options for setting ranges, making it suitable for various applications. The switch is available in different types, each with specific setting ranges and maximum positive and negative working pressures. The Type 901.61 Ex, for example, has a setting range between 5 and 20 mbar with a maximum positive working pressure of 0.5/4 bar and no negative working pressure. On the other hand, Type 901.66 Ex features a wider setting range between 250 and 1,000 mbar with a maximum positive working pressure of 10 bar and a negative working pressure of -1 bar. The switch also provides a broad temperature range from -20°C to 85°C, making it suitable for various environmental conditions. With options for different diaphragm materials, pressure connections, and electrical ratings, the 901 Prescal…Ex® ATEX Adjustable Pressure switch offers adaptability and reliability. Its IP 54 protection class ensures resistance to dust and water, making it suitable for challenging industrial environments.


  • Wastewater technology
  • Liquid level measurement
  • Pump control
  • Medical Technology
To download the latest datasheet click here: 901 Prescal...Ex® ATEX Adjustable Pressure switch

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