System Sensor’s singled-ended, reflected-type Beam Smoke Detectors feature a 4-wire design and are easier to install than dual-ended projected beam detectors because alignment is accomplished via an optical sight and a built-in, two-digit signal strength meter. Available with an integral sensitivity test module, these detectors provide 16 to 328-foot protection coverage in a broad operating temperature range (-22 degrees F to 131 degrees F) to give early warning in environments where temperatures reach extremes. System Sensor

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