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Mechanical humidity stat


Room Humidistats

These room humidistats are designed to control humidification or dehumidification equipment. It provides SPDT control. The sensing element consists of carefully selected and processed human hair, proven to be the most sensitive and stable material known for this application. Under normal conditions these controls retain their sensitivity and accuracy for many years.


  • Wide range 0 to 90% R.H.
  • Dust tight Penn switch
  • SPDT Contacts
  • Field adjustable high and low limit stops
  • Separate mounting plate
  • WARNING - To fulfill our obligations towards Article 33, in accordance to European REACH Regulation No 1907/2006 EC, we hereby inform you that this article contains the following Substances of Very High Concern included in the Candidate list: Cadmium oxide, Lead

Products List1 items

Product CodeRangeDifferentialAdjustment
0 to 90% RH4% RH (fixed)External Knob