Bosch Security Systems of Fairport, New York, has introduced a passive infrared, ceiling-mount motion detector with many new features. The Bosch ISN-CC1-100N has a low-profile design that is less than two-thirds the height of the previous model. Its adjustable mirrors make it easy to change coverage patterns. Vertical adjustment is accomplished using a lever with indications for matching the ceiling height, so there is no visual alignment required. The self-monitoring unit ensures proper installation and operation, and the alarm LED flashes to indicate any problems. Other features include a higher mounting height, a covered tamper switch, and normally closed or normally open alarm relay configuration with a silent solid-state Form 1a/1b relay for more secure operation.