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    Model CLS1 Capacitance Level Switch

    Capacitance Level Switch For Solids, Liquids or Slurries, Fail-Safe Protection, <1 pF Sensitivity
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    Model CLS1 Capacitance Level Switch

    For Solids, Liquids or Slurries, Fail-Safe Protection, <1 pF Sensitivity

    Model CLS1 Capacitance Level Switch provides reliable point level measurement of solids, liquids and slurries in metallic or non-metallic tanks and vessels. Model CLS1 detects the presence or absence of material in contact with the probe by sensing a change in the capacitance. Electronics provide highly sensitive measurement detection (requires less than a 1 picofarad shift from ambient). State of the art technology ignores material build-up on the vessel sidewall or along the probe assembly. One time calibration is simple with a single multi-turn potentiometer. Red LED on housing indicates sensor status. Unit features an adjustable 1-30 second time delay and a 5 amp, SPDT fail-safe relay output. Model CLS1 can be mounted vertically or horizontally.

    Product Applications

    • High or low level detection in bins, silos, tanks, hoppers, chutes and other vessels where liquids, solids or slurries are stored.

    Service:Solids, liquids, or slurries.
    Wetted Material:CPVC.
    Temperature Limits:Process: -40 to 240°F (-40 to 116°C); Ambient: -40 to 185°F (-40 to 85°C).
    Enclosure Rating:NEMA 4X (IP56), PVC, dust tight, water resistant.
    Switch Type:SPDT.
    Electrical Rating:5 A @ 250 VAC.
    Power Requirements:120 VAC, 1.5 VA.
    Conduit Connection:3/4" female NPT.
    Process Connection:1" male NPS.
    Mounting Orientation:Vertical or horizontal.
    Sensitivity:Adjustable to <1 pF.
    Fail-Safe:Switch selectable, high/low.
    Time Delay:Adjustable 1 to 30 s.
    Weight:2.0 lb (0.91 kg).


    • Electronics provide highly sensitive measurement detection (requires less than a 1 picofarad shift from ambient)
    • State of the art technology ignores material build-up on the vessel sidewall or along the probe assembly
    • One time calibration is simple with a single multi-turn potentiometer
    • Red LED on housing indicates sensor status
    • Adjustable 1-30 second time delay and a 5 A, SPDT fail-safe relay output
    • Added installation flexibility with vertically or horizontally mounting