Product info sheet
Room humidistat

with Polyga® measuring elementwith adjusting knob inside the housing

HGMini
HGMini-i

Type Survey

Technical Datameasuring element ................. Polyga®-measuring element,water resistentcontrol range ....................................................... 40...90%rh
breaking capacity
max. 250VAC and0,1 ... 5A ohmic load for dehumidifying
0,1 ... 2A ohmic load for humidifying
0.1 ... 1A for inductive load (power factor >0.8)
lifetime .................................. > 6.000 breaking cycles
Please observe the notes on voltage.
optional microswitch with gold contact
breaking capacity
max. 48 VAC and1...100 mA
optional microswitch up to 10 A
max. 250VAC and
0.1 ... 10A ohmic load for dehumidifying
0.1 ... 3A ohmic load for humidifying
0.1 ... 1.5A for inductive load (power factor >0.8)
allowable ambient temperature ............................... 0...60°C
air-speed ............................................................. 0.2...8 m/s
installation altitude ....................... ≤ 4.000m above sea level
influence of temperatureref. to 23 °C ............................................. ≤ +/- 0.2 % r.h. / K
typ. response time t50 at v=2m/s ................................ 1.2minfixing ................................................... slots in housing basemounting position ......... preferably ventilation slots at rightangles to wind direction
contacting .......................... connecting terminals in the caseapplied directives / standards
low-voltage directive 2014/35/EU
EMC directive 2014/30/EU
DIN EN 60730-1:2012-10
DIN EN 60730-2-13:2008-09
action .............................................................................. 2.C
rated impulse voltage .................................................... 4 kVball indentation test for temperature ............................. 92°C
housing .............................................. solid plastic, light grey
protective system .......................................................... IP20
degree of pollution .............................................................. 2dimensions .......................................................85x55x36mm
weight ............................................................... approx. 60 gType

Type of contact

HGMinichangeover contact: 1 x max. 5 A

HGMini-ichangeover contact: 1 x max. 5 Awith internal scale

HGMinichangeover contact (gold plated):
1 x max. 100 mA

HGMini-ichangeover contact (gold plated):
1 x max. 100 mA
with internal scale

HGMinichangeover contact (gold plated,IP67): 1 x max. 100 mA

HGMini 10A

changeover contact: 1 x max. 10 A

Description of the humidistat
The humidity measuring element which is manufactured under thename Polyga®, consists of several plastic fabric bands each with
90 individual fibres with a diameter of 3 µm each.The fibres areprovided 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 theadjustment 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 withventilation slots at right-angles to wind direction.
Application
The humidistat type HG Mini is used as an on-off controller tocontrol 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, coolingrooms 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 adjustingknob and the scale are inside the housing. This makes unauthorized manipulation by third parties more difficult.

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 witha voltage higher than 48V. If the voltage is higher, there is arisk 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 abroad spectrum of applications under the most varied conditions and loads. We cannot appraise every individual case. Purchasers and/or users are responsible forchecking the equipment for suitability for any particular application. Any existing industrial rights of protection must be observed. The perfect quality of our products isguaranteed under our General Conditions of Sale. Issue: December 2015 HGMini_e. Subject to modifications.

HGMini page 2Dimensions diagram

Mounting

36

has to be carried out by properly qualified personnel

85

68

3990

90

55

0
1060

70

80
104,560
40

40070

50% r.F.

3030*

The mounting location should be chosen so that a representative measurement of the air humidity can be guaranteed, i.e. the humidity readings at the mounting location
should correspond to those in the room as far as possible.

*The humidistat should be exposed to the flow of air.

*When mounting the humidistat on a patress, avoid external
air getting onto the humidity measuring element of the humidistat by sealing it appropriately.

Cleaning instruction

Slot diagram
adjusting knob

Fx>FwFx<Fw
42approx. 5%rh

HG Mini

ONThe humidistat must not come into direct contact withwater, e.g. splashed water when cleaning the climaticchamber etc.

8050% r.F.

*

<1OFF230VAC 5A

Fx

The electrical connection
must only be carried out by
properly qualified personnel

Fx: actual value of the relative humidity
Fw: setpoint value of the rel. humidiy set at the adjusting knob
If the rel. humidity Fx (actual value) falls below the setpointvalue Fw, contact 1/4 opens and contact 1/2 closes.

Typische
Toleranzdesmedium
mittleren
Typicaltoleranceof theSchaltpunktesswitchingpoint+/+/- 6%r.h.
6%r.F.

1. Disconnect the device from the power supply
2. Remove the cover. Clean the cord shaped measuring element using a soft brush and clean water. Do not use a detergent as it cannot be dispersed.
It is important that no water is allowed to get onto the othercomponents, particularly microswitches, terminals or printed circuit boards.
3. Air drying. Do not use warm or hot air (hair dryer).
Maintenance
The measuring element is maintenance-free in pure ambient
air. Aggressive media containing solvent can cause measuring errors depending on the type and concentration. Deposits
which eventually form a water-repellent film over the measuring
element are harmful (such as resin aerosols, lacquer aerosols,
smoke deposits etc.).
Physical influence of temperature on the relative airhumidity
at a temperature fluctuation of ±1K referred to various room
temperatures.
10°C+/+/- 5%r.h.
5%r.F.
+/+/- 4%r.h.
4%r.F.
+/+/- 3%r.h.
3%r.F.
+/+/- 2%r.h.
2%r.F.
+/+/- 1%r.h.
1%r.F.
+/+/- 0%r.h.
0%r.F.
30%r.F. 40%r.h.
40%r.F. 50%r.h.
50%r.F. 60%r.h.
60%r.F. 70%r.h.
70%r.F. 80%r.h.
80%r.F. 90%r.h.
90%r.F. 100%r.h.
100%r.F.
30%r.h.

20°C

30°C

50°C

10%rh

+/-0,7%rh +/-0,6%rh +/-0,6%rh +/-0,5%rh

50%rh+/-3,5%rh +/-3,2%rh +/-3,0%rh +/-2,6%rh

90%rh+/-6,3%rh +/-5,7%rh +/-5,4%rh +/-4,6%rh

It is thus of extreme importance that the temperature is constant for measurements of the relative air humidity. The air must
be homogenous.

1-point-adjustment at 48 % r.h. / 23 °C
Long-term drift: ≤ ±1%r.h. p.a.
Typical switching differential with typical tolerance
Setpoint value
humidity
50 % r.h.

Switchingdifferential
5 % r.h.

Tolerance

60 % r.h.

4 % r.h.

+/- 1,5 % r.h.

70 % r.h.

4 % r.h.

+/- 1,5 % r.h.

80 % r.h.

3 % r.h.

+/- 1 % r.h.

90 % r.h.

3 % r.h.

+/- 1 % r.h.

+/- 1,5 % r.h.

Contact with the inner parts of the humidistat nullifies thewarranty.