fire water pressure sensor

photoelectric smoke detector direct from Wanlin - 12-year factory experience, WL-SFP800 smart fire detector certified UL 217/UL 268/UL 2034/UL 864/CE/EN14604/EN54/FCC. Key specs: Photoelectric Smoke + RF Wireless Interconnect + Mesh Network + Self-Healing, RF Wireless Mesh + 4G LTE Cat.1 Gateway + Cloud Platform + SMS/Push/Email + Voice Alert. Smart fire IoT···