Hygroswitch0 pages

Galltec Mess- und Regeltechnik GmbHt

D-71145 Bondorf . Germany t
Tel. +49 (0)7457-9453-0 . Fax +49 (0)7457-3758 t
E-Mail: sensoren@galltec.de . Internet:www.galltec-mela.det

MELA Sensortechnik GmbH

D-07987 Mohlsdorf-Teichwolframsdorf . Germany
Tel. +49(0)3661-62704-0 . Fax +49(0)3661-62704-20
E-mail:mela@melasensor.de . Internet: www.galltec-mela.de

Product info sheet
Room humidistat tt

Hygroswitch
Hygroswitch-i

Type Survey
Type

Product No. Type of contact

Hygroswitch 4204201K
Hygroswitch-i 4204201L
Hygroswitch 4204701K
Hygroswitch-i 4204701L

Technical Data
measuring element ................. Polyga®-measuring element, t
tttttwater resistent
control range ....................................................... 40...90%rh
breaking capacity
t
max. 250VAC and
tt 0.1 ... 5A ohmic load for dehumidifying
tt 0.1 ... 2A ohmic load for humidifying
tt 0.1 ... 1A for inductive load (power factor >0.8)
t
lifetime .................................... > 6.000 breaking cycles
t Please observe the notes on voltage.
optional microswitch with gold contact
breaking capacity
t
max. 48 VAC and
tt 1...100 mA
allowable operating temperature ............................. 0...60°C
allowable storage temperature ............................. -40...60°C
air-speed .............................................................. 0.2...8 m/s
installation altitude ....................... ≤ 4.000m above sea level
influence of temperature
t
ref. to 23 °C ............................................. ≤ +/- 0.2 % r.h. / K
typ. response time t50 at v=2m/s ................................ 1.2min
electrical contacting ............................. connecting terminals
applied directives / standards
t
low-voltage directive 2014/35/EU
t
EMC directive 2014/30/EU
ttt DIN EN 60730-1:2012-10
ttt DIN EN 60730-2-13:2008-09
action .............................................................................. 2.C
rated impulse voltage .................................................... 4 kV
ball indentation test for temperature ............................. 92°C
protective system ....................................................... IP30D
degree of pollution .............................................................. 2
dimensions ........................................ approx. 81x81x28 mm
independently mounted sensing control
installation ...................................................... wall mounting
weight ............................................................... approx. 58 g
Opening the housing

Apply a flat-headed screwdriver at the top in the locking slot
and press inwards until the housing springs open.

changeover contact: max. 5A ,
with adjusting knob
changeover contact: max. 5A,
with internal scale
changeover contact (gold plated):
1...100 mA
changeover contact (gold plated):
1...100 mA, with internal scale

Description of the hygrostat
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.
The fan shaped measuring element is accomodated inside
the housing and must be protected against coarse dust, dirt
and water. The humidistats are designed for pressureless
systems. The installation location must be selected so that
condensed water cannot enter the inside of the housing. The
installation position preferably with ventilation slots at rightangles to wind direction.
Application
The room humidistat Hygroswitch is an on-off controller to
control the relative air humidity. It is used to control air humidifying and dehumidifying 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
In the case of the room humidistat Hygroswitch-i the external
adjustment knob is replaced with an adjustment wheel with a
scale inside the housing. The adjustment wheel needs to be
aligned to the red mark.
Notes on voltage
The measurement location of the humidity controller
should be selected such that there is no build-up of condensate on or in the device. This applies particularly for
operation with a voltage higher than 48V. If the voltage
is higher, there is a risk of voltage arcing in the event
of water condensation on the microswitch or connecting
terminals which might destroy the controller. In the case
of voltage below 48V, the humidity controller can be used
up to 100%rh.

This information is based on current knowledge and is intended to provide details of our products and their possible applications. It does not, therefore, act as a
guarantee of specific properties of the products described or of their suitability for a particular application. It is our experience that the equipment may be used
across a broad spectrum of applications under the most varied conditions and loads. We cannot appraise every individual case. Purchasers and/or users are responsible for checking the equipment for suitability for any particular application. Any existing industrial rights of protection must be observed. The perfect quality
of our products is guaranteed under our General Conditions of Sale. Issue : December 2015 Hygroswitch_e. Subject to modifi