Room temperature sensor SE5

First things first, because this device sits among a pile of remote controls: the SE5 is not a handheld transmitter. You don't use it to switch anything on or off. It measures how warm it actually is under the heater and reports this to the control unit – the heater then only runs when it is needed.

It becomes interesting where heaters run for many hours at a time, so more in the catering industry than on a balcony. It is battery-operated and wireless, so there is no need to lay any additional cables. A prerequisite is a patio heater with an integrated control system.

The transmitter is intended for indoor use. Keep it dry and do not place it in direct sunlight for extended periods, as this will damage the housing and the batteries.

Clean it only with a slightly damp, soft cloth, without cleaning agents. If the range noticeably decreases, the battery is usually due for replacement—change it before you start troubleshooting the device.

Delivery time: approx. 2 to 3 weeks. Shipping within Germany and Austria is €9.90, free for orders over €100.

If you order the transmitter together with a radiant heater, everything will arrive in one shipment. If you order it later, we will send it as a package.

Your statutory right of withdrawal applies here without restriction — this is stock merchandise, not a custom-made product.

• ExtremeLine – Operating instructions for radiant heaters and lights
• ExtremeLine – Brand catalog 2026

You can download all documents directly here. If you are missing a document, please let us know – we will upload it.