HEAT RAY SENSITIVE AUTOMATIC SWITCH

摘要

PROBLEM TO BE SOLVED: To provide a heat ray sensitive automatic switch which is capable of sensing a human body at plural places to control a load, easily doing constructing work, saving a space and reducing a cost. SOLUTION: A master device A and a slave device B have respective heat ray sensor circuits 17, 37 provided with sensors to sense heat ray. The master body A and the slave device B are connected to each other via a heat ray signal line. Both the master device A and the slave device B are secured under an outdoor eaves with a water-proof packing mounted therebetween. The master body A turns on a switching element of a load controller 14 inserted in a feed passage to a load when a human body is sensed by the heat ray sensor in either the master device A or the slave device B.