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    Pro-therm Controls

''Controls to make life easier'                                                                          Established 1990

Prices for:-

Useful stuff

Technical Specification


Power supply                                                                                               220V +/- 10%

Mains frequency                                                                                          50Hz +/- 20%

Power consumption                                                                                     4W

2 x fused SPDT Output Relay:

Resistive contact rating                                                                               3 Amp 220V - AC1

Inductive contact rating                                                                               1 Amp 220V - AC3

Measuring range                                                                                          0/100%

Operating temperature                                                                                 -10/70 Deg.C

Overall dimension                                                                                        96 x 96 x 63 mm

Overall dimension (IP54 version)                                                                98 x 125 x 75 mm

HUMIDISTAT HP35

Humidity control by Wet & Dry Sensor

General Description


HP35 is a 2 set point digital humidistat utilising 2 sensors for wet and dry bulb temperature measurment. It then calculates from first principals the actual humidity.

2 relay outputs allow humidification and dehumidification control.

2 thermistor sensors are supplied with a wick for the wet and dry temperature sensing over an operating  range of 0/100 % RH .


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


With 0.1% resolution, adjustable hysterisis from 0.2%, the result is a versatile accurate humidistat.

2 sensors supplied

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