- Published in issue 12/1997 on page 32
PIR controlled shop-bell
A PIR (passive infrared) detector coupled with an electrtc light is now widely used rar intruder protection. PIR detectors are also available as stand-alone units which usually have a switched Output for controlling extemal loads. The Argos 431/5595. for example, has a switching capacity of 2,000 watts.