Model P25

SKU: P25

Capacitance Probe, High Temperature and Pressure Service, Tubular Ground

The Delta Controls Model P25 Capacitance Probe is intended for high temperature and pressure chemical processing as well as steam and slurry applications. It also very corrosion resistant and is equipped with triple sealing for utmost safety and reliability.

The P25 is fitted with a wrap-around tubular ground reference which allows full scale range calibration over just a few inches of conductive liquid. The relatively large ground tube provides an open bore. It can be used when the liquid is highly turbulent or carries entrained solids. The open bore also allows fast response speed and resists plugging. The tubular ground reference sheath produces a linear output signal when used in horizontal cylinders or other tanks with nonlinear sidewalls. The electronic module/probe combination can be calibrated outside the vessel for convenience, safety, and without varying the process liquid level.


  • For high temperature and high pressure services
  • High inherent gain sensitivity
  • Allows full scale calibration over a modest change and narrow ranges
  • Works with liquids carrying entrained solids low dielectric constant
  • Insensitive to surface turbulence
  • Built-in ground reference improves sensitivity
  • Linear output signal in irregular tanks
  • Allows calibration to be done outside the vessel
  • Resists flowing currents, waves and vortices


  • Working Pressure: ≤ +650 psig (+44.8 bar)
  • Working Temperature: ≤ +750 °F (+399 °C)
  • Insertion Length:≤ 10 ft (3 m)
  • Process Connection: 2.0 MPT minimum
  • Threaded Process Connection: 2.0 in
  • Flanged Process Connection: ≥ 2.0 in
  • Flange Rating: ≤ 600 lb
  • Available Wetted Materials: 316 Stainless Steel, PTFE, carbon steel
  • Ground Sheath:316 Stainless Steel (other materials available)

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 Service, Tubular Ground

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