Mill Sense is a sensor that measures and logs statistics for air quality, temperature, and humidity. You can view the statistics in the Mill app. Mill Sense has a built-in lithium battery that lasts between 1-3 months (depending on the update interval), or it can remain permanently connected to a USB charger. When connected to a charger, the sensor may be affected by the heat generated during battery charging.
Mill Sense can also be used as an external temperature sensor for Mill heaters and WiFi sockets. It will send updated data to devices connected in the same room via the Mill Norway app, enabling new temperature calibrations. Mill Sense is designed to be mounted on a wall at chest/shoulder height to measure the temperature higher up in the room, compared to the sensors in the heaters, which are often located just 10–20 cm above the floor.