RCM-21 sensor allows measuring such physical quantities as: temperature, humidity, pressure and illuminance. The measurement results are sent to the EFC-01 controller and displayed in the mobile app. Logical functions implemented in the sensor allows using it for the automation of control processes of different devices in the home systems. RCM-21 is based on the operation of digital sensors installed in the device. The sensor can be supplied from the battery or external power source (6 ÷ 24 V AC/DC) by special supply base (PCL-21). Configuration of the sensor is possible for the external power supply of the sensor (this operation is not available for battery supply) An additional magnetic base allows quick mounting and ensures full mobility of the sensor. Ingress protection (IP20) of the enclosure allows only indoor use.