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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 liquid level sensors 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.

SCR Sensor
Product Mounting Tip Material Pressure Range Temperature Range Supply Voltage Range Output Current
Optical liquid level switch Optomax Digital Mounted from inside the vessel: M12x1, M10x1 Mounted from outside the vessel: M12x1, 1/2" -20 UNF, 1/4"NPTPolysulfone or Trogamid7bar/ 101 psi max
20 bar/ 209 psi max
Standard: -25 to 80⁰C
Extended: -40 to 125⁰C
4.5 to 15.4 VdcUp to 100mA
LLC6002 Optomax Industrial M12x1
1/2" SAE
1/4"NPT
Polysulfone or Trogamid7bar/ 101 psi maxStandard: -25 to 80⁰C
Extended: -40 to 125⁰C
4.5 to 15.4 Vdc
8 to 30Vdc
Up to 1A
Optomax LLG Optomax Industrial Glass M12x1
1/4" NPT
1/2"NPT
Glass100bar/ 1450 psi max 600bar/8702 psi maxExtended: -40 to 125⁰C4.5 to 15.4Vdc
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, 1/4"NPTPolysulfone or Trogamid0 to 7bar/ 101psi max 0 to 20bar/ 209psi maxStandard: -25 to 80⁰C3.3 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
Polysulfone25bar/ 363psi maxStandard: -25 to 80⁰C
Extended: -40 to 125⁰C
4.5 to 15.4Vdc
10 to 45Vdc
Up to 100mA
Up to 800mA
POS Glass Tip Liquid Level Switch POS Range 1/2"BSPP 78mm long probe
1/2" BSPP 138mm long probe
Glass80bar/1160psi maxStandard: -25 to 100⁰C Extended: -40 to 140⁰C12 to 28Vdc25mA max.
Honeywell LLE Switches M12x1
M10x1
1/2" -20 UNF
1/4"NPT
Polysulfone or Trogamid0 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
Custom Products Customer specificCustomer specificCustomer specificCustomer specificCustomer specificCustomer specific

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