The 5601P mechanical heat detector from System Sensor is an unmarked, 135-deg. F fixed or rate-of-rise heat detector. The detector is ideal for applications where external marking on the device may compromise the visual integrity of the product and its surroundings. The 5600 series line of mechanical heat detectors includes eight detectors in both single and dual-circuit devices, and 135-deg. F fixed, 135-deg. F fixed plus rate-of-rise, 194-deg. F fixed, and 194-deg. F fixed plus rate-of-rise heat detection. System Sensor

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