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'Controls to make life easier'

Established 1990

    Pro-therm Controls

Technical Specification


Power supply                                                                 220V +/- 10%

Mains frequency                                                            50Hz +/- 20%

Power consumption                                                       4W

1 x fused SPDT Output Relay:

Resistive contact rating                                                  3Amp 220V

Inductive contact rating                                                  1 Amp 220V

Measuring range                                                             10.0/99.9% rh

Operating temperature                                                    -10/70 Deg.C

Overall dimension                                                           96x96x63 mm

Overall dimension (IP54 version)                                   98x125x75 mm

HUMIDISTAT HP27

Digital humidity control

General Description


HP27 is a single point digital humidistat for monitoring and control of humidity in one zone.


The electronic humidity sensor is not supplied as standard.

If required, RHP electronic humidity sensor with a range of 10 to 89.9%, can be specified.

Industrial style humidity sensors with a 2 wire, 4-20mA signal can also be used such as the XH20P, HMD40 with addition of HAL1 power supply.


Available as 96 x 96mm front panel mounting or IP54 surface/wall mount, it's large 20mm display makes for easy reading.


An added feature is the automatic recording of maximum and minimum humidity for later viewing.

UK Mail Address:  Pro-Therm Controls  21 Main Road,   Ratcliffe Culey,

Atherstone,  Warwickshire. UK.   CV9 3NY

We take:

E-Mail: vince@pro-therm.co.uk

Phone:  (0044) 01827 711039

Fax: (0044) 01827 711041