Hygro Module HM800 pages

Galltec Mess- und Regeltechnik GmbHt

MELA Sensortechnik GmbH

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

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
Hygro-Modul HM80 t
with one changeover contact, scale range 30...100%rh, IP00
Application
The hygro module HM80 is a humidity-dependent switch that
can be fitted in equipment such as hygrostats, humidifiers, dehumidifiers, ventilating fans, driers and many more. The module represents an on-off controller with changeover contact. The
switch connection is via a connecting terminal, but can also be
supplied ready-made with cable connections. Several versions
of different lengths are available as a shaft. Protection of the
module is of the IP00 type.
Description of the Hygrostat
The humidity measuring element, produced by Galltec under the
name Polyga®, consists of several synthetic fabric bands each
with 90 individual fibres with a diameter of 3µm. A special process gives the fibre hygroscopic properties. The measuring element adsorbs and desorbs humidity. The swelling effect, which
is predominantly in a lengthways direction, is carried via a suitable lever system to a microswitch with an extremely small switching path. The measuring element reacts quickly and precisely
to the change in air humidity. By adjusting the setpoint value
control knob, the lever system is engaged so that when the set
air humidity is reached the microswitch is activated.
The fan shaped measuring element is protected by a perforated sensor tube. The hygro module is designed for pressureless
systems. The mounting position should be chosen such that
condensed water cannot get onto the microswitch.

Connection diagram
adjusting knob
Fx>Fw

Fx 50%rh ...... ±3.5%rh
tfor measuring range < 50%rh ......... ±4%rh
range of operation .................................................... 35...95%rh
measuring medium ............... air, pressureless, non-aggressive
switching difference (microswitch) ref. to 50%rh.. approx. 4%rh
switching distance between the microswitches
t
for HM80-2 ................................................. 0...+15%rh
breaking capacity of the changeover contact
t
ohmic load (cos φ=1) ..............................15A AC 230V
t
inductive load (cos φ=0,7) ........................ 2A AC 230V
t
direct voltage ...................................... 0.25A DC 230V
t
low voltage ........................................100mA, 125V AC
contact material ................................................................. silver
allowable storage temperature .................................. -30...60°C
allowable operating temperature ................................. 0...60°C
medium temp. coefficient ....... -0.2%/K relative to 20°C and 50%rh
adjustment ........................... at average air pressure 430 m NN
allowable air speed ........................................................ 8m/sec
t
with gauze protection (order no. 20.014) ....... 15m/sec
time constant T63 at v=2m/sec ........................................ 120sec
sensor length, material ....................... 220mm, high-grade steel
connecting terminals ........ for conductor cross sections 1.5mm2
cable connection .................................. via twist nipple M20x1.5
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
type of protection (external adjusting knob) ....................... IP00
measuring element .....
....... Polyga®-measuring element, water resistent, washable
weight ............................................................... approx. 0.25 kg

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 HM80_E. Subject to modific