Features
Description of the humidistat
The humidity measuring element which is manufactured by Galltec under the name Polyga®, consists of several plastic fabric bands each with 90 individual fibres with a diameter of 3 µm each.The fibres are provided with hygroscopic characteristics by a special process. The measuring element adsorbs and desorbs moisture. The effect, swelling predominantly in longitudinal direction, is transmitted via a lever system to a microswitch with a small switching distance. The measuring element responds to the change in air humidity. It is possible to adjust the lever system by setting the adjustment knob so that the microswitch is actuated when the set air humidity is reached.
Applications
The humidistat type HG Mini is used as an on-off controller to control the relative air humidity. It can be used to control air humidifiers and dehumidifiers in offices and computer rooms.
Other areas of use are storage of foodstuffs and luxury foods, cooling rooms for fruit and vegetables, greenhouses for gardening use, the textile industry, the paper and printing industry, the film industry and hospitals.
The room humidistat HG Mini-i is designed so that the adjusting knob and the scale are inside the housing. This makes unauthorized manipulation by third parties more difficult.
Specification
Technical Data
measuring element ......Polyga®-measuring element, water resistant
control range ........................................................ 40...90%RH
lifetime ........................................ > 6.000 breaking cycles
microswitch with silver contact
max. breaking capacity
ohmic load, dehumidifying 5 A 250 V AC
ohmic load, humidifying 2 A 250 V AC
inductive load (power factor > 0,8) 1 A 250 V AC
min. switching current 100 mA1)
microswitch with silver contact up to 10 A
max. breaking capacity
ohmic load, dehumidifying 10 A 250 V AC
ohmic load, humidifying 3 A 250 V AC
inductive load (power factor > 0,8) 1,5 A 250 V AC
min. switching current 100 mA1)
microswitch with gold contact
max. breaking capacity 100 mA 250 V AC
min. switching current 1 mA1)
1) not relevant when switching high resistance loads (>10kOhm) e.g. logic levels
Please consider the notes on voltage.
influence of temperature
ref. to 23°C ................................................. ≤ ± 0.2%RH/ K
typ. response time t50 at v=2 m/s ........................... 1.2 min
allowable ambient temperature ................................ 0...60°C
air-speed ................................................................. 0.2...8 m/s
installation altitude ...................... ≤ 4.000 m above sea level
fixing ........................................................slots in housing base
mounting position ........... slots right-angled to wind direction
contacting .......................................... connecting terminals
action ............................................................................. 1.C.L
rated impulse voltage .................................................. 4 kV
ball indentation test for temperature .............................. 92°C
housing................................................solid plastic, light grey
protective system .......................................................... IP20
degree of pollution .................................................................. 2
dimensions...................................................... 85X55X36 mm
weight ................................................................ approx. 60 g