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Dwyer Series CLS1 Capacitance Level Switch

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

Model CLS Capacitance Level Switch provides reliable point level measurement of solids, liquids and slurries in metallic or non-metallic tanks and vessels. Model CLS 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 CLS can be mounted vertically or horizontally.

See Dimensions


Service: Solids, liquids, or slurries.
Wetted Material: CPVC.
Temperature Limits: Probe: -40 to 240°F (-40 to 116°C); Electronics: -40 to 185°F (-40 to 85°C).
Enclosure Rating: NEMA 4X (IP56), PVC, dust tight, water resistant.
Switch Type: SPDT.
Electrical Rating: 5A @ 250 VAC.
Power Requirements: 120 VAC, 1.5 VA.
Conduit Connection: 1/2" 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 seconds.
Weight: 2.0 lb (0.91 kg).
Agency Approvals: CE.

  • Model Number CLS1 Capacitance Level Switch
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