Trafag - Optical Level Switch TOS

  • No moving parts
  • Hermetic construction, sealed
  • Minimum degree of protection IP65 electronics

Optical Level Switch TOS

The optical sensor is located in a metallic body which includes a polysulfone prism inside of which there is inserted an infrared transceiver. As soon as the sensor is immersed in the liquid, the refraction index of the prism changes and a large part of the infrared beam is dispersed in the liquid, causing the output to change state.


  • Water treatment
  • Machine tools
  • Hydraulics
  • Food and Beverages
  • Chemical and Pharmaceutical

Technical data

Process attachment G 3/8
Product type Level measurement
Technology Infrared transceiver
Measuring range Working Pressure: 260 bar max (25°C) or 200 bar max (85°C)
Connection M12x1 – IP67, DIN 43650 A – IP65
Output PNP or NPN
Media temperature -40…+85°C
Temperature range -30…+55°C
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