With the aid of this "Infrared Detector" it is made possible to carry out functional tests with infrared remote controls units, infrared transmitters in light barriers, etc. This module consists of an infrared receiver which indicates through switching on a light emitting diode, if the remote control on test emits infrared radiation. Suitable for most of the remote controls and transmitters. An indispensable test equipment for radio and TV workshops and also for hobbyists.