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Liquid Level Switches

Optical Liquid Level Switches

SST Sensing’s optical liquid level switches are solid state, so there are no unreliable moving parts. They are compact, only protrude a small distance into the application and are able to detect small amounts of liquid.

The intelligent switches have low sensitivity to ambient light and are not affected by foam when in air, or small bubbles when in liquid.

Their ability to survive in wide operating temperatures and harsh liquid media for long periods of time result in a very robust switch.

If our standard range of optical liquid level switches do not meet your requirements, housings, cabling and connectors can be customised to suit your application needs. We can also incorporate built-in features like PWM outputs and insensitivity to moving liquids.

See our range below.

Product Mounting Tip Material Pressure Range Temperature Range Supply Voltage Range Output Current
Optomax Digital Range of Liquid Level Switches Optomax Digital Mounted from inside the vessel: M12x1 M10x1 Mounted from outside the vessel: M12x1 1/2" -20 UNF 1/4"NPT Polysulfone or Trogamid 7bar/ 101 psi max 20 bar/ 209 psi max Standard: -25 to 80⁰C Extended: -40 to 125⁰C 4.5 to 15.4 Vdc Upto 100mA
LLC6002 Optomax Industrial M12x1 1/4"NPT 1/2" SAE Polysulfone or Trogamid 7bar/ 101 psi max Standard: -25 to 80⁰C Extended: -40 to 125⁰C 4.5 to 15.4 Vdc or 8 to 30Vdc Up to 1A
sensing solutions Optomax Industrial Glass M12x1 1/4" NPT 1/2"NPT 1/2"SAE Glass 100bar/ 1450 psi max 600bar/8702 psi max Extended: -40 to 125⁰C 4.5 to 15.4Vdc or 8 to 30Vdc Up to 1A
Optomax Basic Range of Liquid Level Switches Optomax Basic Mounted from inside the vessel: M10x1 Mounted from outside the vessel: M12x1 1/2"SAE 1/4"NPT Polysulfone or Trogamid 0 to 7bar/ 101psi max 0 to 20bar/ 209psi max Standard: -25 to 80⁰C 3.3 to 24Vdc (customer provides) Up to 4mA (Customer provides)
LLHP Range of Liquid Level Switches LLHP 3/8"BSP 1/2"BSP 1/2"NPT 3/4" -16 UNJF Polysulfone 25bar/ 363psi max Standard: -25 to 80⁰C Extended: -40 to 125⁰C 4.5 to 15.4Vdc 10 to 45Vdc Upto 100mA Upto 800mA
POS Glass Tip Liquid Level Switch POS Range 1/2"BSPP 78mm long probe 1/2" BSPP 138mm long probe Glass 80bar/1160psi max Standard: -25 to 100⁰C Extended: -40 to 140⁰C 12 to 28Vdc 25mA max.
Honeywell LLE Switches M12x1 M10x1 1/2" -20 UNF 1/4"NPT 1/2" SAE Polysulfone or Trogamid 0 to 7bar/ 101psi max 0 to 20bar/ 209psi max Standard: -25 to 80⁰C Extended: -40 to 125⁰C 3.3 to 24Vdc, 4.5 to 15.4 Vdc, 8 to 30Vdc Up to 1A

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