Thermostats with external sensors can be used for room temperature control via the rotary knob, as well as for controlling the temperature of underfloor heating systems. This function ensures the maintenance of a minimum heating surface temperature, even at a reduced room temperature. Floor sensor included. CE manufacturing standard – The marking certifies that products placed on the market comply with the applicable requirements of EU directives. Materials: PC (polycarbonate) + ABS (Acrylonitrile Butadiene Styrene) Color – casing and rotary knob – RAL 9003 – signal white. Characteristics: Operating voltage: 230V ±10%, 50Hz Power supply: via connection to control unit/mains Power consumption at idle: 0.3W Switching output: Relay Switching capacity: 1.8 A resistive load, 200VA inductive Fuse: T2AH Max. number of actuators: 10 (max 3W/Actuator) Max. current of connected units: 1.8A Actuator operation: NC Temperature setting: 10°C – 28°C Set temperature resolution: 0.25°C Ambient temperature detection (internal sensor): 0 to 40°C NTC internal measurement accuracy: ±0.5K Reference value calibration: ±2K Thermoelectric head protection function (actuators): every 14 days for 6 min Frost protection: Normal operation 10°C / drop: 8°C Ambient temperature: 0 to 50°C Storage temperature: -25°C to +75°C Permissible ambient humidity: 80%, non-condensing Installation type: on wall surface Connection cable: NYM-O 5 x 1.5mm² Terminals: 7 screw terminals – 0.22mm² to 1.5mm² Protection class II Ingress protection IP 20.