A DEVICE FOR CONTROLLING AN ELECTRICAL LOAD

摘要

A device for controlling an electrical load, such as lighting comprises a presence or absence detector responsive to the presence of a person within the detection range of the detector. In addition to the presence/absence detector, the device comprises a proximity sensor responsive to the presence of a hand within the detection range of the proximity sensor. The detection range of the presence/absence detector is at least ten times the detection range of the proximity sensor. In at least one mode of operation, the device is configured to switch on the load in response to detection of the presence of a person by the presence/absence detector and switch off the load in response to the sensing of the presence of a hand by the proximity sensor. Alternatively, in at least one mode of operation, the device is configured to switch on the load in response to the sensing of the presence of a hand by the proximity sensor and switch off the load in response to the detection of the absence of a person by the presence/absence detector.