Ceraphant PTP31B

Absolute and gauge pressure switch for measurement in gases, steams or liquids



  • Piezoresistive, metal sensor for safe measurement
  • Pressure measuring range: 400 bar (6000 psi)
  • Accuracy: up to 0.5 %
  • Maximum allowable overload pressure : 600 bar
  • Process temperature: –40 to 100 °C (–40 to 212 °F)

Fields of application

  • Measurement of absolute and gauge pressure in gases, vapors, liquids and dusts


The Ceraphant PTP31B is a pressure switch from Endress+Hauser with a piezoresistive sensor for safe measurement and monitoring of absolute and gauge pressure. The pressure switch with compact design is extremely stable and overload resistant for up to 400 bar.

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Ohannes Markarian

A great company that provided a wide range of products from various suppliers. Support is excellent and very responsive

Questions & Answers

Hi I want to measure pressure using pressure switch in a duct (actually slight vacuum). The switch will activate a trip. Do I measure static or dynamic pressure? What sort of tapping point do I need and where in duct am I best to measure? Which Pressure Switch would you recommend? Best Regards Rob (1 answer)
by Rob, 8 months ago
First thing when selecting a pressure switch is knowing the expected pressure range that it will work on, after that, you should consider if you need to measure absolute pressure or relative pressure, both can work for vacuum applications but the absolute pressure will measure from 0 bar abs and won't compensate ambient pressure changes. Relative pressure sensors will measure from -1 bar g and beyond and will compensate for ambient pressure changes. The best place for installing it will depend from case to case, but typically, you will want to avoid places where condensation can accumulate over the measuring sensor. In the Technical Information document, you can find the manufacturer installation recommendations.
by Visaya, 8 months ago
Ceraphant PTP31B
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Valentine Godin

Great product and customer care! Reliable, fast and honest... I have recently purchased 2 pieces of equipments; their service has been spot on from start to finish, understanding my needs, providing useful advice and rapid assistance when it was required! Highly satisfied, I highly recommend their teams and would definitely work with them again in the future!

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