Filter Clogging Indicators (for Hydac Filters)

Hydac clogging indicators are designed to indicate visually and/or electrically when the filter elements must be cleaned or changed.

  • The operational safety of a system and efficient utilisation of a filter element can only be guaranteed if clogging indicators are used.
  • Depending on the type of filter, vacuum, return line or differential pressure clogging indicators are used.


Some users install filters without clogging indicators and prefer instead to replace or clean the elements according to a specified time schedule or according to a set number of operating hours. However, this involves some risk.

Fitting a clogging indicator has several advantages:

  • The operator no longer has to estimate when the element is clogged
  • The unnecessary costs of changing the element too early are avoided
  • All standard filters can be fitted with a clogging indicator at any time, by simply screwing it in

Speak to our filtration technology division about your factory automation requirements.


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