Model P56

SKU: P56

Capacitance Probe, High Temperature and Pressure, Tubular Ground

The Delta Controls Model P56 Capacitance Probe utilizes RF admittance technology for high pressure and temperature applications. The concentric ground sheath provides a ground reference for sensing low dieletric materials. Model P56 is designed to replace nuclear gamma ray sensors and solid mechanical displacers in many applications. Use of the P56 avoids difficulty due to large size as well as high purchase and installation costs.

The P56 can be installed in high pressure / temperature fatty acid reactors, steam condensate knockouts, coal gasification, and similar difficult applications. The ceramic materials used are extremely strong. Delta Controls has developed packaging that protects the units from inadvertent damage while being transported or stored.


  • Ceramic primary seals and insulators
  • Multiple sealing produces maximum reliability and safety as well as a long service life
  • Alumina probe jacket withstands abrasion from slurries and entrained solids
  • Can be used for steam condensate drainage under maximum service conditions
  • Ground sheath provides measurement accuracy in low dieletric media


  • Working Pressure: ≤ +2500 psig (+172.4 bar)
  • Working Temperature: +1000 °F (+538 °C)
  • Insertion Length:≤ 60 in (1.52 m)
  • Process Connection : 1.5 in MPT minimum
  • Threaded Process Connection: 1.5 in to 2.0 in
  • Flanged Process Connection:1.5 in minimum
  • Flange Rating:≤ 600 lb
  • Available Wetted Materials: 316 Stainless Steel, carbon steel, blended alumina ceramic
  • Ground Sheath: 316 Stainless steel (other materials available)
  • Other:Optional intergland vent connection for lethal or toxic service

Required Ordering Information

  • Detailed model number
  • Tag or nameplate detail (if required)
  • Documentation & testing packages (if required, refer to Additional Resources in the product catalog)
  • Process fluid or material name
  • Process fluid or material dieletric constant
  • Maximum process temperature
  • Maximum process pressure

Additional Information


Capacitance Probe, High Temperature and Pressure, Tubular Ground

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