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System Sensor 5603 135°F Fixed Temp, Single-Circuit Mechanical Heat Detector - Smoke Detectors - Amazon.com
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System Sensor 5601P 135F Fixed Temp/Rate-of-Rise, Single-Circuit Mechanical Heat Detector with Plain
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Honeywell System Sensor® 5601P 5600 1-Circuit Mechanical Heat Detector, 3 A at 6 to 125 VAC, 0.1 A at 250 VDC Power Source | SMC
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