Ontech Accessories


Ontech Temp sensor 2m


External temperature sensor with a 2 meter cabel.

2,5 mm plug that is designed for the models Ontech GSM 9035 and Ontech Relay 9015.

When wired to a Ontech GSM 9025, cut off the plug and connect the cables to the screw terminal

Precision +/- 1 degree C.

The cable can be extended up to 10 meters by splicing the cable. 


Ontech backup battery


Lithium ion battery 4,2 volt 1000 mAh.

Compatible with the Ontech GSM 9025 and Ontech GSM 9035 where it is already placed inside the unit.

Also compatible with the older units Ontech GSM 9020 and Ontech GSM 9030.