FAFNIR have an overfill prevention solution for all tanks, underground and aboveground

 They have put together the 76 A Level Switch with the transducer NB220 QSF.

The ideal overfill protection of your storage containers containing potentially, contaminating or hazardous liquids.

Product Highlights

‘Quick & Concise

  • Easy installation with a 2-wire terminal to the transducer, fitted independent of polarity.
  • The overfill sensor requires no maintenance after installation; no hidden costs.
  • No on-site calibration required.
  • Self-testing sensors.


  • With no moving parts, the FAFNIR Overfill prevention 76A & NB 220 boast excellent life expectancy and leading reliability.
  • Space-saving, robust and corrosion-free design.
  • Versatile.
Here you can find some examples of applications: http://www.fafnir.com/Petrol-Station-Sensors/Overfill-Prevention/Application-Examples.php