Filter Minder® from Engineered Products Co. - Waterloo, IA


  • The Global Leader

    Filter Minder® - The Global Leader of air and fluid filtration monitoring solutions, offering:

    Threaded Mount Air Filter Restriction Indicator / Gauge

    -  Low-Dollar Cost, High-Value Add
    -  Superior Quality and Performance
    -  Solutions-Driven Portfolio
    -  Industry's Broadest Product Line
    -  Highest Level Customer Support
    -  Award Winning On-Time Delivery


    Got a problem?  Challenge Us.  We will find a solution.

  • Myth vs Fact

    Freightliner Truck On HighwayThe Filter Minder® filter monitoring device makes it easy for you to tell when it's time to change filters.  

    The myth is that an automotive air filter should be changed about every 6,000 miles, or when it "looks dirty."

    The fact is that a certain amount of dirt in an air filter actually increases its filtering efficiency by reducing the size of the holes in the filter media which helps stop smaller dirt particles.

    This means that instead of a maximum life of 6,000 miles, the typical air filter may actually last anywhere from 60,000 to 100,000 miles!

  • Private Labels

    Filter Minder® with Ford Private LabelThe 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.

  • When To Service?

    A Dirty Filter Element Is Better Than A Clean OneAir filter restriction is not time or miles dependent.

    Mileage of as much as 300,000 to as little as 5,000 miles have been reported when restriction is reached.

    It is important to know the highest full load restriction that occurred during the vehicle operation in order to service BEFORE the redline.  

    After an element has reached its redline value, it only takes a little more contaminant before high fuel consumption and poor engine operation occurs.  Don't Dust Your Engine!

  • Use A Filter?

    Engineered Products Company can provide a high quality monitoring device.  

    A Variety of Engine Air FiltersThe Filter Minder® can be found on a wide variety of applications throughout the world, including:  Automotive - Truck - Construction - Agriculture - Compressors - Blowers - Hydraulics - Lawn and Garden - Irrigation Industries - Oil Fields - Marine.... or any industry that uses a filter.

Service Smarter

  • Use Full Filter Capacity

  • Stop Costly Over Servicing 

  • Optimize Service Intervals

  • Reduce Labor

  • Avoid Excess Fuel Consumption

  • Extend Engine Service Life

  • Eliminate Unplanned Downtime



Prevent Potentially Catastrophic Damages Due To Under Servicing

Switch Your Switch! We Don't Just Monitor Filters Anymore

Pressure Switch Series 125424

Check out our new PRESSURE SWITCH, a versatile, low cost, small-footprint product that can be used on brake systems, air and fuel filters, compressors, pumps and blowers, and is available in a wide range of calibrations (up to 120 PSI!).

The Filter Minder® Pressure Switch - Series 125424, designed to monitor pressure in severe duty applications. 

Check out the video at Switch Your Switch! to learn more.

Want to request a product sample or demo kit?  Let us know!  

Pressure Switch Benefits

  • Low Cost

  • High Reliability

  • Sealed Connector

  • Reduce Labor

  • Compact, Low Mass

  • Versatile Mounting System

  • Molded-In

  • Wide Range of Calibration

  • Up to 120 PSI

Air Line Monitoring Just Got Easier!


    The Filter Minder® Air Line Filter and Indicator

    Engineered Products Company is pleased to introduce a new addition to its portfolio of filter monitoring products.... the innovative, versatile and convenient Air Line Filter and Indicator. Click through the showcase to learn more and view the ALFI Animation.

  • Air Line Filter and Indicator
    Early Filter Life 

    In routine use, air flows through the Air Line Filter, trapping particles.

    The Air Line Filter and Indicator (ALFI) protects against harmful debris and contaminants in high pressure air lines in a wide variety of industrial, transportation and on-site applications requiring compressed air or gas.  

  • Air Line Filter and Indicator
    End of Life

    Extreme clogging will extend the red indicator (as device progresses towards full bypass mode) until it is fully extended, locked, and requires replacement. Build-up of debris will open the bypass to keep air flowing.

    When restriction becomes excessive, a bright red indicator deploys from the device, indicating it is time to change the filter.

    The filter cartridge is replaceable with a 1-1/4” wrench/socket and is ready again to protect your operating assets in just seconds.

Filter Minder® Product Portfolio

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  • Filter Minder® Product Portfolio
  • Visual / Mechanical Gauges and Indicators monitor the condition of engine air filters, fuel filters or other low vacuum/pressure applications. The indicators are available in a single
    Read More

    Visual / Mechanical
    Indicators & Gauges

  • Visual / Electrical Switches monitor the condition of engine air filters, fuel filters or other low to medium vacuum/pressure applications. The indicators are available in:(1) single
    Read More

    Visual / Electrical

  • Electronic Pressure Sensors monitor various vacuum or pressure conditions ranging from cabin pressures to air filter or fuel filter restriction levels. Filter Minder® sensors feature
    Read More


  • A wide array of accessories are available to complement Filter Minder's® product line up, including LED displays, custom fittings, mounting brackets, hoses and grommets.  
    Read More

    Accessories / Related