RAE is a self-actuating proportional controller with a small P-band. The series includes: RAE 5054 with built-in temperature sensor. RAE 5056 with remote sensor. RAE 5154 with built-in sensor and positive shut-off feature. RAE Radiator thermostats are designed for use in 2-pipe domestic heating systems. RAE sensors incorporate a frost protection setting and max/min limitation of the temperature setpoint. RAE sensors are equipped with a snap-lock mechanism which ensures quick, firm and long lasting mounting of the sensor to the valve body, without the use of tools. RAE 5056 is equipped with 2 m of ultra-thin capillary tube, which is coiled up within the remote sensor housing. After sensor mounting capillary tube is pulled out to the required length.