The new SPY series features the smallest passive infrared (PIR) detectors of their type presently marketed. Models are designed for in-wall or in-ceiling installation, or behind the wall (or ceiling) mounting. The only visible part of the SPY after installation is the ultra miniaturized lens itself.False alarms caused by environmental disturbances are virtually eliminated by a combination of light rejection filter and pyroelectric low-noise detector. The SPY has the additional protection of built-in two-step pulse counting. With careful attention to installation site and periodic walk-testing. The SPY PIR detector will give reliable, long-life trouble-free service.
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