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The FILTERSCAN Air Filter Monitor is an innovative application of the CleanAlert air flow sensing technology. It tracks the change in differential pressure to monitor filter clogging.

As a result, FILTERSCAN tells you when to change your facilities' HVAC air filter.

Rather than have to guess or resort to imprecise (and mostly inaccurate) schedules, you can now know exactly when your air filters are dirty and need replacement.

  • Servicing filters too often results in unnecessary expense from the costs of the filters themselves and the time required to service them.
  • Waiting too long to service a filter allows pressure to build up in an HVAC system, thereby increasing energy costs by lengthening the time fans must operate to move hot or cold air throughout the system and putting added wear on the system, reducing system life.

FILTERSCAN Takes the Guesswork out of Replacing HVAC Air Filters

Instead, consider installing the FILTERSCAN to monitor your air filters and eliminate this guesswork. Ensure that your HVAC systems are operating effectively, efficiently, and safely.

The FILTERSCAN provides visual and audible alerts which let you know that a filter needs to be serviced when the change in differential pressure reaches a specified level. The FILTERSCAN also provides a 5 VDC output that can be connected to a compatible BAC system. An optional wireless model with a wall-mounted receiver is also available.

Easy to Install. Recalibrates When the Air Filter is Replaced

Installation of the FILTERSCAN is straightforward, and the unit is easily recalibrated each time a clogged air filter is serviced. Because the FILTERSCAN calibrates itself every time a filter is serviced, it can be used with a wide variety of filters. Users therefore can change filter models as desired.

The CleanAlert FILTERSCAN Air Filter Monitor, Model FS-242, may be installed upstream, downstream, or differentially across the air filter (using an available tubing kit - see below). 

For more information, see How to Install the FILTERSCAN Air Filter MonitorHow to Calibrate the FILTERSCAN Air Filter Monitor and How To Operate the FILTERSCAN Air Filter Monitor.

The FILTERSCAN is compatible with single- and multi-speed blower HVAC systems and most VAV (Variable Air Volume) systems.

Please contact us with any questions regarding the FILTERSCAN® Air Filter Monitor.

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The FILTERSCAN meets all regulatory guidelines for radiating and conductive emissions in the United States, Canada.

For purchases outside the United States and Canada, please contact us to order. If you are interested in becoming an authorized reseller please contact us as well.


  • Automatic Monitoring
  • Compatible with many Filters
  • Visual and Audible Alerts
  • AC/DC or Battery Operation
  • Wired Output to Remote Device (FS-242-C series only)
  • Optional Wireless Model Available


  • Residential/Commercial HVAC Systems
  • Single or Multi-Speed Systems
  • Network Operating Center Filtration
  • Hospitals and Clean Rooms
  • Pharmaceutical Manufacturing
  • Electronics Manufacturing

Supporting Documentation

Click to download the FILTERSCAN Product Information Sheet

Click to download the FILTERSCAN Installation and Operation Guide