Discriminating Interstitial Brite™ Sensor (DIS)

The discriminating interstitial Brite™ sensor (DIS) detects the presence of various liquids in tanks as well as sumps and other locations. The DIS is designed to interface with the EVO™ Series fuel management systems.



  • Installs in the interstitial space of steel and fiberglass double wall tanks and sumps.
  • Uses light beam traveling through probe to determine if sensor is wet.
  • Microprocessor inside sensor interprets readings and communicates data to the EVO™ Series fuel management system.
  • Fail-safe digital communications with built-in alarm if sensor malfunctions.
  • Sensor can distinguish between petroleum and water.
  • Alarms indicate petroleum present, water present and sensor malfunction.



  • UL listed.
  • ATEX approved.
  • IECEx approved.


For dry tank interstitial monitoring.


Each DIS comes with 25′ of oil-resistant cable. For fiberglass tanks, the DIS is pulled into the interstitial space using a “fish” string or wire. For steel interstitial tanks, the DIS is lowered directly to the bottom of the interstitial space through a 2″ NPT fitting provided for that purpose on the tank. Optional installation kits are available which include a riser cap and other parts required to complete installation.

Order Info

Model Description
FMP-DIS Discriminating interstitial Brite sensor (EVO 550 and EVO 5000)
FMP-DIS-U Discriminating interstitial Brite sensor (EVO 200 and EVO 400)
TSP-KI2 Interstitial sensor riser cap kit for 2″ riser pipes
  • Note: The DIS and the DIS-U communicates with the ATG using 3 wires and 2 wires, respectively.