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supermarket smoke alarm, 4G Smart Combustible Gas Detector, ···
supermarket smoke alar···
2026-08-17
supermarket smoke alarm — Wanlin, 12-year Chinese smart fire detector manufacturer, WL-GA200 (4G Smart Combustible Gas Detector) certified UL/CE/EN54. Catalytic/Electrochemical Sensor + 4G LTE + IoT Cloud + Valve Control + LCD. 10-year battery, 4G/NB-IoT/LoRaWAN, OEM/ODM from 500 units, factory direct pricing 50-70% below Western brands.