Cart 0 items for £0.00

No products in the cart.

Optomax Industrial Range of Liquid Level Switches

Return to Previous Page


Supply Voltages (Vs) 4.5 to 15.4Vdc
or 8 to 30Vdc
Supply Currents (Is) 2.5mA max. (Vs = 4.5 to 15.4Vdc)
or 7.5mA max. (Vs = 8 to 30Vdc)
Output Sink and Source Current (Iout) 1A
Operating Temperatures Standard: -25 to +80°C
or Extended: -40 to +125°C
(Above +85°C Trogamid is suitable for use in water based liquids, oil based liquids can cause deformation of the sensing tip and must be tested for compatibility)
Storage Temperatures Standard: -30 to +85°C
or Extended: -40 to +125°C
Housing Materials Polysulfone (Standard)
or Trogamid
Sensor Termination 20AWG, 250mm PTFE wires, 8mm tinned
Operating Pressure 0 to 7 bar




Output Voltage (Vout): Iout = 1A
Vs = 4.5 to 15.4Vdc
Output High Vout = Vs – 1.5V max
Output Low Vout = 0V + 0.5V max
Output Voltage (Vout): Iout = 1A
Vs = 8 to 30Vdc
Output High Vout = Vs – 1.8V max
Output Low Vout = 0V + 0.7V max


Wire Designation
Red Vs
Green Output*
Blue 0V

*See part numbering guide for output type and logic

Features & Benefits


  • Reverse polarity, ESD and transient over-voltage protected
  • Wide supply voltage ranges
  • N and P type output configurations, capable of sinking or sourcing up to 1A, can directly drive loads
  • Standard and extended temperature ranges available
  • Polysulfone or Trogamid housing material options
  • Thread options for external mounting
  • High operating pressure


  • Solid state so no moving parts to cause unreliability
  • Small in size so they can be installed in applications where space is limited
  • Can detect tiny amounts of liquid when positioned correctly, ideal for leak detection
  • Fast response time
  • Repeatable switching point
  • Built-in output delays available on request for applications where sloshing causes intermittent switching
  • Very robust permitting use in a wide range of fluids and chemicals


Liquid sensing 001_450

When in air the infrared light is reflected back to the detector


Liquid sensing 002_450

When in liquid the infrared light is refracted and the output switches

Reviews (0)


There are no reviews yet.

Be the first to review “Optomax Industrial Range of Liquid Level Switches”

Downloads Sample/Quote Request

Sample/quote request

  • This field is for validation purposes and should be left unchanged.

Related Products

Optical liquid level switch Quick View

Optomax Digital Range of Liquid Level Switches

Optomax Digital

Optical liquid level switch
  • Low in power
  • Low in cost
  • Compact design
Read more
Quick View

Optomax Industrial Glass Range of Liquid Level Switches

Optomax Industrial Glass

  • Harsh environments
  • Industrial supply voltage
  • Direct load drive
Read more
Quick View

POS Glass Tip Range of Liquid Level Switches


  • Harsh environments
  • Extreme temperatures
  • LED output indication
Read more
Quick View

LLHP Range of Liquid Level Switches


LLHP Series
  • Robust steel housing
  • Agressive enviroments
  • Larger mounting thread; standard or custom
Read more
Back to top