LiveLink sensor unit with integrated PIR presence sensor and brightness sensor for integration into a LiveLink Basic wireless radio network (2.4 GHz radio mesh network). LiveLink Sensor IR Micro for daylight-dependent control and presence detection. Radio range of the sensor up to 15 m. Battery-operated sensor with a standard 3.6V AA battery and a battery life of at least 8 years. Constant light control with switch-off function when there is sufficient daylight. Passive infrared presence sensor, with adjustable switch-off delay time, optionally in automatic mode (automatic on, automatic off) or semi-automatic mode (automatic off, manual on). Permissible ambient temperature -5 - +45 °C. Outside diameter 86.5 mm, installation height 26.4 mm. Rectangular detection area, detection during sitting activities max. 5.4 x 3.6 m, detection during walking movements max. 7.2 x 5.4 m at a recommended installation height of 2.5 m. Permissible installation height 2.5 m to 4 m. Protection class (DIN EN 60529): IP 42. Color white. Sensor with two-part housing consisting of mounting ring and sensor housing. For ceiling mounting. Installation of the sensor mounting ring with two fastening screws. Fastening screws included in delivery. Tool-free fastening of the sensor housing to the mounting ring using locking lugs. Electrical supply via 3.6V AA battery, no additional mains connection required. Batteries included in delivery. Commissioning via Bluetooth connection to the wireless network via LiveLink Basic Wireless Install App and smartphone (iOS/Android). Adjustable parameters: setpoint for constant light control, switch-off delay time, semi/fully automatic.