AutoSig® SMART Fuel Filter System
Fuel Filter – Water Separator – Integral Water Probe.

Recreational and Busses AutoSig

NEW! - For Recreational Vehicles (Rv) & Busses

  • Fuel Filter
  • Water Separator
  • WIF Sensor System
  • Patented 2016
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The AutoSig® 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 AutoSig® SMART filter system is designed to filter and let you know when it needs to be serviced.

The Entratech AutoSig® System utilizes a patented design that places the water probe INSIDE the filter housing. AutoSig® 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. Entratech AutoSig® SMART Fuel Filters can communicate directly with ECM’s and instrument panel indicators. The versatile AutoSig® system can be configured for networking, Wi-Fi and other communication standards.

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

AutoSig® eliminates damage and contamination to filter bowl/can mounted WIF sensors.

Installation of fuel filters in areas that are prone to the elements can cause damage to wiring and sensing probes. With AutoSig®, 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
  •  Wireless capability

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.

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The AutoSig® SMART Filter System is available in 3 different fuel filter separator sizes.

Entratech manufactures units based on filter media type and can size. For gasoline or diesel applications. Applications that require a larger can size, custom filter heads or different media materials can be engineered upon request.

3 sizes of fuel filters

AutoSig® SMART Filter System is available with the latest connectors for marine and transportation applications

Communication standards in development include Bluetooth, Wi-Fi and NMEA 2000

Entratech Systems LLC
202 East Fox Rd.
Sandusky, OH 44870
PH: 419-433-7683
FAX: 419-433-8293

©2018 Entratech Systems LLC, 202 East Fox Rd., Sandusky OH 44870, United States
PH: 419-433-7683 | | FAX: 419-433-8293
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