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Filter Minder® Visual / Mechanical Indicators & Gauges

Filter Minder® Air Line Filter Cartridge

Air Line Filter and Indicator

How it Works

Air Line Filter with IndicatorAir Line Filter with Indicator
Replacement Cartridge Below
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.

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

If the stainless steel filter element become completely plugged, the device progresses into bypass mode to allow continued operation of your equipment.

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




Mounts to a flat surface utilizing the two mounting holes with a 1/4" bolt/screw.

Air Line Filter CartridgeSpecifications

  • Up to 150 PSI
  • Standard Thread Size: 1/2 - 14 NPT
  • Anodized Aluminum Die Cast Housing
  • Stainless Steel Filter Screen Mesh and Dynamic Components
  • Total Weight: 0.6 lbs
  • Filter Cartridge Material: Nylon
  • -40°F to 200° (-40°C to 93°C) Temp Range


Overall Dimensions: 1-1/2” x 4” x 3-3/4”

A Few of Many Industries Served

Air Filtration Markets Served


  • Can be configure to measure pressure, vacuum or differential pressure

  • Durable, heavy-duty design

  • Private labeling available

  • Multiple mounting configurations

  • Resistant to under-hood chemicals


  • Maintains last recorded level of filter restriction

  • Allows for full use of filter capacity

  • Reduces down-time and aids in maintenance planning
  • Reduces ooperational costs for end-users
  • Private labeling available