Visonic DUO-240 360° Miniature Ceiling Mount Dual-Technology Digital Intrusion Detector

·         The world's smallest ceiling-mount dual-technology detector

·         Suitable for home, office and other commercial applications

·         Easily installed in any ceiling up to 4.5m (15 ft)

·         Durable, sleek, and elegant design blends seamlessly into any decor

·         Optimized signal processing of both MW and PIR channels

DUO 240 is a microcomputer-controlled, ceiling-mounted dual technology intrusion detector. Its operation is based on two physical phenomena - the infrared (IR) radiation emitted by the

Human body and the Doppler frequency shift caused by a person moving in a microwave (MW) field. The IR and MW technologies, when combined in a single detector, complement each other to assure the most reliable detection and immunity to false alarms. The superiority of the DUO 240 over other dual detectors has been achieved by the advent of a True Motion Recognition™ algorithm (patented). This advanced motion analysis method provides the DUO 240 with the ability to distinguish between the true motion of a human body and any other disturbances which invariably cause false alarms.

Another unique feature of the DUO 240 is the MW Motion Simulator circuit (patents applied for), which simulates the effect created by a human body moving in the MW field. The simulation routine is carried out periodically for the purpose of self-testing, supervision and assurance that the MW detector operates properly.