A PIR Sensor designed to be compatible with the OPH range of Dimplex infrared patio heaters. The sensor has a maximum loading of 3kw and a 200 degree detection angles and will help to cut running costs by only being used when required. The PIR sensor will cut in and out once heat movement is detected within its detection range, and features a time on adjustment of between 5 seconds and 18 minutes after detection.