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underground passage smoke detector

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rate of rise and fixed temperature detection, Smart Fire Safety All-in-One DIY Kit, WL-SFP900, Wanli 2026-07-31
rate of rise and fixed temperature detection direct from Wanlin Fire Protection — 12-year factory experience, WL-SFP900 smart fire detector certified CE/EN14604/EN54/UL217/UL268/FCC/QCVN. Key specs: Multi-Sensor (Smoke+Heat+CO) + 4G LTE + WiFi + Cloud Platform + Complete Installation Kit + 10-Year Design, 4G LTE Cat.1 + WiFi + Cloud Platform + Mobile APP + ···