Phone: 888-206-4108
Email: sales@levelandflowonlinesales.com
Fax: 636.537.1405

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Switch-Tek Intrusive Capacitance Level Switch

Switch-Tek™ Intrusive Capacitance Level Switch

-Data Sheet-



The Switch-Tek™ Intrusive Capacitance switch detects the presence of liquids or air by measuring the conductive or dielectric values which are present in all materials. An electrical capacitor is formed between the level switch and its environment, whether air or liquid. As liquid comes into contact with the probe tip, the capacitance effect is greatly increased and the switch changes state.

This is an excellent choice for a broad range of relatively clean, conductive, non-coating or scaling type liquids. The relay or FET output provides a reliable switch interface with remote devices such as a PLC, SCADA or alarm. For maximum flexibility, the sensor is offered in general purpose and intrinsically safe versions with two probe lengths and PP or PFA Teflon materials, allowing compatibility with almost any application.


Accuracy: ± 1 mm in water Sensor material: PP or PFA
Repeatability: ± .5 mm in water Sensor rating: NEMA 6 (IP68)
Dielectric range: >20 constants Short threads: 3/4” NPT (3/4” BSP)
Conductive range: >100 micromhos Long threads: 3/4” NPT (3/4” G)
Supply voltage: 12-36 VDC Mounting gasket: Viton
Consumption: Relay: 25mA
FET: 5mA (dry)/19mA (wet)
Cable type: 8 ft. (2.5 m), 4-wire (relay) or 3-wire (FET), 22 gauge with ground, shield & PP or PFA jacket
Relay rating: 60 VAC/VDC @ 1A CSA approval:

Class I, Groups A, B, C & D
Class II, Groups e, F & G; Class III

FET rating: 36 VDC @ 100 mA
Switch output: Selectable NO or NC states CSA entity parameters: Vmax = 32 VDC; Imax = 0.5 A
Ci = 0; Li = 0
Temp rating: F: -40º to 194º
C: -40º to 90º
  CSA certificate: LR79326-4
Pressure rating: 150 psi (10 bar) @ 25°C, derated @ 1.667psi (.113 bar) per °C above 25 °C CE compliance: EN 50082-2 immunity
EN 55011 emission

Call toll-free: 888.206.4108--- Email: sales@levelandflowonlinesales.com --- Fax: 636.537.1405