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Two-pipe, single setpoint, pneumatic humidistat used to provide proportional control of pneumatic valves on humidification or dehumidification systems.


  • Durable HP970 series humidistat.
  • Pilot operated for high capacity.
  • Direct Acting (DA) and Reverse Acting (RA) models are available.
  • Vertical or horizontal mounting.
  • Backplate has molded air connections; no separate fittings needed.
  • Variety of cover finishes and display styles available.

Product Specifications

Airflow Usage
0.011 scfm (5.2 mL/s)
Dimensions (in.)
3 1/4 in. high x 2 in. wide x 1 5/8 in. deep
Dimensions (mm)
83 mm high x 51 mm wide x 41 mm deep
Maximum Safe Operating Pressure (psi)
25 psi
Maximum Safe Operating Pressure (kPa)
170 kPa
Temperature Range (F)
45 F to 125 F
Temperature Range (C)
7 C to 52 C
Order Cover Separately
Shipping and Storage Temperature Range (F)
-30 to +150 F
Shipping and Storage Temperature Range (C)
-34 to +66 C
Reverse Acting
Number of Pipes
Scale Markings
15 to 75% RH
Throttling Range (%RH)
3 to 15% RH
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