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Filter Minder® Visual / Electrical Switches

Filter Minder® Non-Locking Fuel Switch

How the Fuel Filter Restriction Monitoring Switch Works

The Filter Minder® Non-Locking Fuel Switch continuously monitors the fuel filter and tells when the filter is restricted. Triggers fuel filter warning light via the engine computer or directly to the warning light. For use on diesel suction-side fuel filters.

Filter Minder® Non-Locking Fuel Switch


156389 (Packard Metri-Pak 150 Series)
156351 (Ampseal 16)


Mounts directly to the fuel system.  See Accessories / Related Products for adaptor fittings and brackets for remote mounting.


  • Vacuum or Pressure Monitoring
  • Vacuum Ranges:
    • Minimum:  2inHg (6.8 kPa) ±10% @ 23°C to 20 inHg (68 kPa)       
    • Maximum:  ±10% @ 23°C                  
  • Pressure Ranges:
    • Lowest set point 1 PSI (6.89 kPa) ±10% @ 23°C.
    • Highest set point 10 PSI (68.95 kPa) ±10% @ 23°C
  • Operating Temperature: -40 to +250°F (-40 to +121°C)
  • Material: Nylon
  • Mounting Port Connections: Mount directly to fuel system with supplied male Straight Thread O-Ring fittings.  Contact Filter Minder® for correct size.
  • Mounting Attitude:  Switch may be mounted in any orientation.
  • Switch: Normally open or closed available


  • Length: 2.3" (58 mm)
  • Diameter: 1.5" (38 mm)