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Process Control Instruments, Field Devices and Industrial Automation
PRODUCTS & SERVICES is a provider of process control instruments and field devices for Oil & Gas, Industrial Machinery, Pipelines, Custody Transfer, Tank Gauging, Waste Processing, Water Treatment Plants, Burner Management Systems and Incinerators, Conveyor Control, Food & Beverage, Motor, Pump & Compressor Control, Wireless Telemetry, Data Logging, Real-Time Process Data to Web.

We are an online distribution channel of genuine manufactured instruments such as

  • Flow Transmitters, Indicators, Sensors and Switches.
  • Pressure Switches, Indicators and Transmitters.
  • Level Switches, Indicators and Transmitters.
  • Temperature Elements, Switches and Transmitters.
  • Mass Flow Meters.
  • Density Meters.
  • pH/ORP Analyzers.
  • Disolved Oxygen Analyzers.
  • Turbidity Meters.
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EH Ceraphant PTP31 Absolute and gauge pressure switch with welded metal sensor for measurement in gases, steam or liquids. 12 to 30V DC. 1bar to 400bar measuring cell. Threads process connection and Robust Stainless Steel housing. 4-20mA analogue or PNP switch communication. ***DISCONTINUED***



Pressure switch for monitoring absolute and gauge pressures in gases, vapours, liquids and dust with metallic process isolating diaphragm;

  • Finely graduated measuring ranges from vacuum to 400 bar (6000 psi)
  • Versions for use in hygienic applications
  • Electronic versions
    • one PNP switch output
    • two PNP switch outputs
    • PNP switch output with additional analog output 4...20 mA (active)
Your benefits

This compact pressure switch impresses with the latest in technology being used:

  • Integrated switching electronics for decentral and economic process monitoring and control
  • Quick and flexible process integration thanks to modular connections
  • High reproducibility and long-term stability
  • Function check and information on site thanks to LEDs and digital display
  • Ceraphire process isolating diaphragm: corrosion proof, abrasion-proof and extremely overload-resistant
  • Excellent accuracy and briefest response time right to the smallest measuring range
  • Operation and visualisation also with personal computer and ReadWin 2000 or FieldCare
  • Upper part of housing can be rotated by 310, therefore best readability of measured values in all orientations
  • DESINA compliant
  • 3A and EHEDG approved
Measuring principle

The process pressure acting upon the metallic process isolating diaphragm of the sensor is transmitted to a resistance bridge via a fluid. The change in the output voltage of the bridge is proportional to the pressure and can be measured directly.

Measuring Principle Pressure switch
Characteristic Intelligent pressure switch with piezoresistive sensor, longterm stable and overload resistant
Supply voltage 12...30VDC
Reference Accuracy 0,5%
Long term stability 0,15% of URL/year
Process temperature -40C...100C
Ambient temperature -40C...85C
Measuring cell 1bar...400bar
Max. overpressure limit 600bar (9000psi)
Process connection Threads
Communication 1x PNP switch
2x PNP switch
1x PNP switch + 4...20mA analogue
Design approvals EN10203-3.1

Specialities Digital display
Robust SS-housing with Ra < 0,8 micron
Successor PTP31B


EH Ceraphant PTC31 Absolute and gauge pressure switch with oil-free ceramic sensor for measurement in gases or liquids. 12 to 30V DC. 100mbar to 40bar measuring cell. Threads process connection and Robust Stainless Steel housing. 4-20mA analogue or PNP switch communication.



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