Liquid Sensor (ULS)

The liquid sensor (ULS) is a low cost sensor which may be used with all EVO™ Series fuel management systems. This sensor is also compatible with S940 Sensor Alarm Console. Based on float-switch technology and made of chemically-resistant materials, the ULS may be installed in sumps, dispenser pans, steel double wall tanks or other locations where the presence of liquid indicates a leak has occurred.



  • Highly reliable float technology and closed output circuit ensures that leaks are detected.
  • Chemical-resistant materials assure compatibility with most liquids.



For dry steel tank interstitial and containment sump monitoring.


Each ULS sensor comes with a 25′ cable. ½” NPT thread is provided on the compression gland fitting attached to the sensor’s cable, allowing it to be suspended from standard electrical boxes and fittings. The sensor may be positioned vertically by adjusting cable length. For steel interstitial tanks, ULS is lowered into the opening provided on the tank and is suspended by optional TSP-KI2 installation kit. Other mounting methods available depending upon application and location.

Order Info

Model Description
FMP-ULS Universal liquid sump sensor (EVO™ 200, EVO™ 400, EVO™ 550 and EVO™ 5000)
TSP-ULS Universal liquid sump sensor (for use with S940 only)
TSP- K12 Interstitial sensor riser cap kit for 2″ riser pipes
  • Note: This sensor communicates with the ATG using 2 wires.