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Filter Minder® Visual / Electrical Switches

Filter Minder® Demo







Installing a Threaded Mount Air Filter Restriction Gauge

Installing an air filter restriction gauge is quick and easy!  The following instructions detail the steps to install a Filter Minder® Grommet Mount air filter restriction gauge in your vehicle.

When it comes to filter maintenance, when to change the filter can be a guessing game without the proper tool to indicate when the filter's life has actually been reached.

Cabin Air FilterWe offer an expansive line of Filter Minder® filter monitoring devices and mounting options which allow filter elements to be serviced when they have reached the end of their service life and maximum efficiency in dirt-holding capacity, and not prematurely serviced and disposed of on a time, mileage or "looks dirty" basis. 

Our Filter Minder® filter monitoring devices include our best selling graduated service indicator,  economical single position service indicators, electrical single and graduated switch indicators, and electronic sensors.

In addition to air filter monitoring devices, we offer fuel filter monitors, HVAC filter monitors, and low pressure gauges to monitor crankcase and other pressure applications.

Explore the Read More links to find out more about the Filter Minder® line of products or see our FAQ Section for more information.


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A Few of Many Industries Served

Air Filtration Markets Served


  • Uses a wiping motion to keep switch contacts clean for a long service life

  • Molded-in integral connectors

  • Versatile design with many options

  • Highly dampened to prevent switch dither

  • Multiple mounting configurations


  • Continuously monitors filter condition and tell when filter is restricted

  • Opens or closes a switch at highest set point which provides a signal to the control module or light

  • Allows full use of filter capacity

  • Reduces down time and aids in maintenance planning

  • Reduces operational costs for end-users

  • Helps prevent excess fuel consumption due to a restricted filter