Outdoor PIR/microwave detection

May 2004 Perimeter Security, Alarms & Intruder Detection

The wall mount outdoor OD850 TriTech PIR/Microwave Detector is a detector intended for use outdoors and in other harsh environments. It uses Motion Analyzer II PIR signal processing and linear travel distance (LTD) microwave processing to provide excellent catch performance of people while ignoring slightly moving objects such as tree limbs and hanging signs. Advanced processing techniques and mechanical design combine to provide a detector that offers superior performance in a wide range of weather conditions.

The Motion Analyzer II PIR signal processor uses multiple thresholds and timing windows to analyse timing, amplitude, duration and polarity of signals to make an alarm decision. It will not alarm on extreme levels of thermal and illumination disturbances caused by hot and cold drafts, sunlight or lightning.

The microwave signal processor measures the linear travel distance of a target to make an alarm decision. It eliminates alarms for objects that move but do not travel such as tree limbs and hanging signs.

The detector offers two user-selectable PIR sensitivity settings. The standard sensitivity setting is recommended for maximum false alarm immunity, while intermediate sensitivity is recommended for locations where an intruder is expected to cover only a small portion of the protected area.

In addition to an alarm relay, there is a Form 'C' unsupervised, timed relay contact that transfers one second after an alarm and follows a user-selectable timer. The time will expire at the set time after the last alarm (it resets on each new alarm).

DIP switch settings allow for selection of modes including use of both PIR and microwave technologies or just one at a time and day/night options.

For more information contact Bonny Pedra, Bosch Security Systems, 011 651 7810, [email protected], www.boschsecuritysystems.com



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