Nitemax Infrared Viewer
Nitemax Infrared Viewer... Filtering down from their development for military and security forces there is a readily available range of see-in-the-dark equipment. Generally the equipment available achieve this function by two different methods and these are firstly by using a special chemical agent applied to a cathode tube to...
Motion Sensors
Motion Sensors... These usually come as two slightly different types. The first type consists of two parts, one an emitter and one a receiver. An infra red light beam is emitted between the two parts and if this is broken an alarm will sound. This barrier-beam type is useful for locking off areas or perhaps even placing...