Signal Filters is the filter division of Entratech Systems specializing in marine fuel filters. The Signal Filters™ SMART Fuel Filter System alerts you to water in your boats fuel system. Signal Filters™ 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. Signal Filters uses an embedded NMEA 2000 interface & connector The Signal Filters™ SMART Fuel Filter System comes with a 316 stainless steel head/mounting bracket with 3/8 NPT ports. The Signal Filters™ System is different! The modern design allows for multiple communication configurations. The Signal Filters™ SMART Fuel Filter System is Designed to pass UL 1105 ABYC and US Coast Guard fuel system requirements. Depth of experience, innovative thinking, and manufacturing skills has allowed us to design and build dependable sensors for marine, on-highway, off-highway, and stationary applications. Signal Filter sensors are made and assembled in Sandusky Ohio about 1 hour west of Cleveland Ohio.