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2-wire Conventional Heat Detector Alarm Sensor: Skype firealarm87 /wechat 15220176087 2-wire Conventional Heat Detector Heat Alarm Sensor The device is intelligent sensors that utilize a state-of-the-art thermistor sensing circuit for fast ...

2-wireconventional Photoelectric Smoke Detector Sensor Alarm: visible alarm indication. They flash every six seconds indicating that power is applied and the detector is working properly. The LEDs latch on in alarm. LEDs will be off when a trouble condition ...

4-wire Smoke Detector with Sound and Relay Output Network Smoke Sensor Fire Alarm Detector: Skype firealarm87 / wechat 15220176087 4-wires Smoke Detector with sound and relay output, Operates by Advanced MCU Expert Algorithm Software. The detectors are photo-electronic detector uses a state ...

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2-wire Conventional Heat Detector Alarm Sensor