Posted in | Capacitance Sensor

PROCAP 1 & 11: Capacitance Probe for Detecting the Presence or Absence of Material

By sensing minute alterations that are as low as 0.5 pF in capacitance, the PROCAP I and II standard capacitance probes are able to detect the absence or presence of material in contact with the probe. This is a result of the difference in the dielectric constant of the material versus the air.

They have simple calibration, provide interference free operation and fail-safe functionality, as well as being able to perform accurately even in sticky, dusty, or clinging materials.

A wide variety of extensions and probes, in addition to Class II hazardous location ratings, make these point-level capacitance probes ideal for many liquid, solid and slurry materials.


  • Concrete, mining, plastics, chemicals, food ingredients, coal/fly ash, pharmaceuticals, foundries, grain, feed, wood or paper processing and a number of other materials
  • Point level detection and process control for liquid, solid and slurry materials
  • Can be utilized in tanks, vessels, bins, chutes and conveyors 


  • Temperature stable calibration and protection from RF interference, operates below RF range
  • Optional sensing probes: Teflon or Delrin sleeved, food grade, bare, flush mount, flexible and solid extensions
  • ‘Quick-Set’ simple calibration
  • Triple thread screw-off cover
  • Visual LED indicates sensor status: uncovered, covered or power failure
  • Unsurpassed sensitivity 0.5 pF
  • PRO-Shield compensates for material buildup
  • Adjustable time delay to 30 seconds
  • Fail-safe, switch selectable high/low
  • Dual conduit entrance 


  • Process Temp: To 250 °F Delrin/Bare probe (121 °C); to 500 °F Teflon probe (260 °C)
  • PROCAP I Power Requirements: Universal power supply 24 to 240 VAC/VDC
  • PROCAP II Power Requirements: Selectable 115/230 VAC
  • Output Relay: DPDT 10 Amp at 250 VAC
  • Mounting: 1-¼ ” NPT or ¾ ” NPT 316 SS standard; 1-¼ ” NPT 316 SS & sanitary flange optional
  • PROCAP I  Ambient temperature range:  -20 to +145 °F  (-28 to +62 °C)         
  • PROCAP II  Ambient temperature range: -40 to +158 °F (-40 to +70 °C)
  • Hazardous Locations Enclosure Type: NEMA 4X, 5, 9 & 12
  • Pressure: 500 PSI
  • Housing Enclosure: Die cast aluminum, USDA approved powder coat finish
  • Approvals & Certifications: Listed for Class II, Groups E, F & G

Video Credit: BinMaster 

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