Filter Minder® Air Filter Restriction Monitoring Indicator / Switch 175578

The graduated indicator monitors engine air filters. The position indicator progressively fills the window as air filter restriction increases, locking at the highest restriction. The air filter should be changed when the position indicator reaches the red zone. Mounts in a panel or dash for convenience of the driver or operator. An illuminated version is available. Bezels in chrome, black, or green. Air cleaner fittings, and vacuum hose available.