Filter Minder® Air Restriction Indicator featured on both Two Guys Garage and Shadetree Mechanic

The Filter Minder® air filter service indicator measures vacuum in the air induction system in 'inches of water vacuum.'

The Filter Minder® is calibrated per engine or vehicle manufacturer's recommendations.

Most diesel engines operate at a maximum 20 to 25 inches water vacuum under full load.

Gasoline engine calibrations can vary depending on the engine size and air cleaner design. Small gas engines (2-5 HP) should usually limit restriction to 3 inches maximum, 6-25 HP should limit filter restriction to 8" maximum, and most gasoline engine powered automobiles 20 inches maximum.

Some vehicles with the Filter Minder® as standard equipment may use a higher calibration than the above guidelines. If in doubt, contact Engineered Products Co. for recommendations.

Diesel suction fuel filters are usually monitored in inches of mercury. The maximum restriction is typically 10-12 inches of mercury.

The Filter Minder® reads the restriction in the air induction system. Air filters usually have low restriction for most of their service life, and the position indicator will not move very much. Then, as the air filter reaches the end of available service life, filter restriction increases rapidly, and the position indicator of the service indicator will move faster towards the red zone.

The chart below illustrates typical air filter restriction readings. Click to enlarge.

The Filter Minder® is a durable product that may last the lifetime of the vehicle.

For severe applications, it is recommended that the Filter Minder® be checked periodically to make sure it is working properly.

Replacement Filter Minder® products are available from a variety of OEM vehicle manufacturers, filter after-market suppliers, and Filter Minder®.

Contact Filter Minder® or Find a Distributor

The Filter Minder® can be private labeled with your company name, logo, and part number along with your color preference.

Text can be printed so that it is readable with the Filter Minder® mounted in a specific location or orientation (with the reset pointing up or down).

For high volume annual requirements, there are no price penalties. There is a one-time artwork and design charge for each specific label.

Read more: Private Labels