Radiator thermostatic control

A thermostatic control device 10 for regulating the flow of heating fluid in a conduit attached to a radiator comprises actuation means 16, 17 operable to alter the flow of heating fluid in the conduit, processing means 21 for controlling the actuation means, a first temperature sensor 18 for sensing the ambient temperature in the vicinity of the device, and a second temperature sensor 19 for sensing the temperature of the conduit. The processing means 21 receives temperature inputs from the first and second temperature sensors and produces an output based on the temperature inputs for controlling the actuation means. The processing means calculates a correction to the temperature input measured by the first sensor using the temperature input measured by the second sensor.