Model P21

SKU: P21

RF Admittance Probe, Tubular Ground

The Delta Controls Model P21 probe has high intrinsic gain. It is equipped with a wrap around concentric ground reference sheath which acts as a ground reference when used in plastic and lined tanks. The linear ground sheath allows it to be used with transmitters in horizontal cylindrical tanks and other containers having nonlinear sidewalls. It requires only a small 1″ NPT process connection. It has high inherent gain sensitivity and is useful on materials having low dielectric constants, such as light hydrocarbons. It allows full scale calibration over a very small level change, and calibration can be done outside the vessel.

Features

  • High inherent gain sensitivity
  • Allows full scale calibration over a very small level change
  • Insensitive to surface turbulence
  • Output signal is linear to liquid depth
  • Calibration can be done outside the vessel
  • Only a small 1" NPT process connection required
  • Use for sensing light hydrocarbons and materials with low dielectric constants
  • Linear output in irregular tanks
  • Built in ground reference for plastic & lined tanks

Specifications

  • Process Working Pressure: 1500 PSIG (100 BAR) @ 100°F (38°C).
  • Process Temperature: -460 to +450°F (-273 to +230°C).
  • Materials: 316 S.S. and PTFE are basic; other metals are optional.
  • Process Connections: 1" MPT is minimum; any larger threaded or flanged connection is optional.
  • Ground Sheath: Metal tube, welded to the gland body. Sensing probe centering guides are provided as needed.
  • Electronic Module: Compatible with all Delta Controls Models.
  • Maximum Insertion: 20 feet (6 meters).
  • Bottom Support Bracket: May be required when insertion is over 60 inches and the liquid is agitated or turbulent.
  • Double Block and Vent Seals: Optional for toxic and hazardous services.

Applications

This probe is equipped with a wrap around concentric tubular ground reference sheath. It has high inherent gain sensitivity and is useful on materials having low dielectric constant, such as LPG, benzene, and other light hydrocarbons.

The linear ground sheath also allows it to be used with transmitters in horizontal cylindrical tanks and other containers having non-linear sidewalls. It also allows the electronic module (transmitter or switch) to be calibrated outside the vessel. This is done by turning the probe upside down, filling the tubular sheath with process liquid to the desired coverage depth, and adjusting the electronics unit at each liquid depth appropriate to the model configuration. Liquids that are gaseous at ambient conditions must be done under normal operating conditions.

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