ETF300120 Thermostat/hygrostat

This adjustable thermostat and hygrostat, ETF300, with either a normally open (NO) or normally closed (NC) contact, manages both relative humidity and temperature. It is used to control installed devices, such as a fan heater, to turn on or off at the required humidity and temperature levels, that are set by the user. The result is elimination of water condensation at a reduced operational cost.

CE Declaration of Conformity GOST cULus_UL Listed
Feature: IP 20
ETF300 Product Image
Voltage (V) 115 V AC
Frequency (Hz) 50/60
Weight (kg) 0.10
ETF300 Catalogue drawing image
Item no.: ETF300120
EAN no.: 8713574111769
  • Technical data
  • Features
  • Downloads
  • Certificates

Technical data


Electronic hygrostat-thermostat monitors the relative humidity and the temperature independently of each other, and it manages heaters and filter fans to prevent condensation and corrosion inside the enclosure. Mounting clip for 35 mm DIN rail (EN 60715).

Setting range:

0 °C to +60 °C, and 40 to 90% R.H.


Plastic according to UL94 V-0.

Switch capacity:

240 V AC, 8(3) A. 120 V AC, 8(3) A. 24 V DC, 4 A. Value in brackets for inductive load.

Operating temperature:

-20 °C to +60 °C.

Service life:

50,000 cycles.


Pole terminal for 2.5 mm².


IP 20.


CE, EAC, cULus_UL Listed.


RAL 7035.

Pack quantity:

1 piece.



Adjustable thermostat and hygrostat, with a normally open (NO) and normally closed (NC) contact.


The thermostat and hygrostat monitors both relative humidity and temperature and can therefore, control a single heater, increasing the enclosures temperature in order to reduce the relative humidity. Customers are able to adjust the relative humidity and temperature inside the enclosure, in order to create a suitable environment for the installed components. The normally open contact will therefore close (turning on the heater) when either, the temperature drops below the set value, or when the relative humidity rises above the set value, this could happen at the same time.


The installed devices, such as fan heaters, automatically turn on or off when they are required, which reduces the operational cost of the control panel. Customers can adjust the required humidity and temperature, which means it can be installed in any enclosure, and is not dependant on the other installed components or equipment. The reliable thermostat and hygrostat manages both the relative humidity and temperature within the enclosure, preventing water condensation from occurring.

CAD 2D drawing (DXF) ETF300120 1002 KB
CAD 2D drawing (PDF) ETF300120 90 KB
CAD 3D drawing (STEP) ETF300120 11 MB
EPLAN P8 macros (ZIP) ETF300120 STEP 2 MB
Image (JPG 800 x 470 px) ETF300 Catalogue drawing image 70 KB
Image (JPG 600 x 600 px) ETF300 Product Image 94 KB
Item sheet (PDF) ETF300120 ENGLISH 206 KB
Mounting instructions document (PDF) Thermal Management ETF300 332 KB
Document (PDF) CE Declaration of Conformity 62 KB
Document (PDF) GOST 630 KB
Document (PDF) cULus_UL Listed 76 KB