Signal Filters SMART Fuel Filter System

MEDIUM-DUTY Fuel Filter – Water Separator – Water Probe.

Recreational and Busses SignalFilters
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For Marine, Generators, Trucks, Recreational Vehicles (RV) & Busses

  • Medium-Duty Fuel Filter/Water Separator
  • WIF Sensor System
  • Patented Product
    1. Signal Filters are patented in US, EU, China and other countries.
Filter Sizes Available:
6" filter.
4" filter.

The Signal Filters SMART Filter System is an integrated system custom designed for the recreational vehicle industry combining a fuel filter, water separator and integral water in fuel sensor. It filters the fuel, removes water and senses water in the fuel separator (diesel or gas) before the water can enter the engine. Water in the engine fuel system can cause engine damage, hard starting, loss of power, misfiring, or stalling. The Signal Filters SMART filter system is designed to filter and let you know when it needs to be serviced.

The Signal Filters System utilizes a patented design that places the water probe INSIDE the filter housing. Signal Filters is engineered for the recreational vehicle industry with a disposable spin on filter that can be easily replaced while the sensor electronics stay mounted in the filter head. Signal Filters SMART Fuel Filters can communicate directly with ECM's and instrument panel indicators. The versatile Signal Filters system can be configured for networking, Wi-Fi and other communication standards.

See Product Page or Spec Page for details and material specifications.

By upgrading with Signal Filters,
you eliminate damage and contamination to bottom mounted WIF sensors.

Installation of fuel filters in areas that are prone to the elements can cause damage to wiring and sensing probes. With Signal Filters, road debris, dirt, salt and other hostile conditions can no longer cause physical damage and water intrusion that leads to sensor failure.
RV problem filter
bus problem filter
RV problem filter
bus problem filter

Typical filter applications can result in sensing failure and false alarms.


  •  Real time water level sensing in the bottom of a fuel filter water separator
  •  Easily serviced metal spin on fuel filter
  •  Patented technology allows water level sensing for gasoline and diesel fuel engines
  •  Corrosion resistant construction – 316 stainless steel filter head
  •  No plastic bowl to discolor & become unclear
  •  Compatible with common engine ECM's

See Product Page or Spec Page for details and material specifications.

Call or email Entratech to discuss your application.

We partner with your engineers to design and build dependable sensor solutions. Our engineered smart sensor assemblies and wiring harnesses are assembled in the USA.

1-419-433-7683 |
Signal Filters Fuel Flow Animation
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Energy Efficient ISO 9001:2015 ABYC_Certificate Member of NMEA
Thomas Supplier
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Signal Filters 202 East Fox Rd., Sandusky OH 44870
PH: 419-433-7683
FAX: 419-433-8293
Signal Filters™ Is a registered trademark of and manufactured by Entratech Systems LLC |