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

The AutoSig® SMART Fuel Filter System, fuel water separator, with built in water-in-fuel (WIF) sensor,

is available with a 316 stainless steel head/mounting bracket. The Disposable spin on filter can is available in three standard can lengths. Multiple electronic outputs including NMEA 2000 are available.

AutoSig SMART Fuel Filter System
autosig NMEA
For NMEA 2000 systems
autosig AS-SS-G1
with Gauge Kit
autosig AS-SS-L3
with Indicator Lamp

Connected equipment.
The AutoSig® SMART Fuel Filter System alerts you of water in your fuel system. AutoSig® is the only “SMART” spin on fuel filter/water separator with an internal water probe. A water in fuel alert can provide early warning of trouble. The AutoSig® system is available with standard mount gauge or dash indicator light. The 10 micron, high efficiency, water separating, spin on filter is available in three standard lengths 4", 6" and 8". Coming Soon: #AS-SS-N2K Kit with Imbedded NMEA 2000 interface & connector.
The AutoSig® SMART Fuel Filter System comes with a 316 stainless steel head/mounting bracket with 3/8 NPT ports.
The AutoSig® System is different! The modern design allows for multiple communication configurations. AutoSig is Designed to pass UL 1105 ABYC and US Coast Guard fuel system requirements.

Why do I need to communicate with my fuel filter?
Consider its location and its function out of site and out of mind may not be a good thing. What if your fuel filter sent you a notification that it needed changing BEFORE it could cause harm to your engine or ruin a day on the water or a days’ vacation?



  • AutoSig® connects to supplied wire harness pigtails or to the customers own wire harness.


  • Cast 316 stainless steel head/mounting bracket with (4) 3/8 inch NPT ports.

Standard can diameter (3-3/4") available in three lengths:

  • 4"
  • 6"
  • 8"


  • 10 micron custom formulated paper filter media removes 99% of free water.

To discuss your unique product application contact a representative today:
PH: 419-433-7683 or FAX: 419-433-8293
Or CLICK HERE to contact us using our online form

AutoSig® Fuel Flow AnimationCutaway animation of Fuel flow
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Signal Filters 202 East Fox Rd., Sandusky OH 44870
PH: 419-433-7683
FAX: 419-433-8293
AutoSig® Is a registered trademark of and manufactured by Entratech Systems LLC |