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Visual clogging indicators show when a filter element is clogged, and how clogged it is. They are meant for high-traffic areas where they can be observed on a regular basis. 

The clogging indicators with designation AOR and AOC are visual pressure difference indicators with a reset function or control function.

Clogging indicator type
max. operating pressure
Stainless Steel: 6,000 psi (420 bar) Aluminium: 3,200 psi (220 bar)
operating temperature
14-176 °F (-10-80 °C)


  • Maintenance free
  • Continuous pressure difference measuring
  • The potential for early identification is increased
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