smart fire IoT hardware wide temperature operation

fire IoT wireless digital pressure gauge direct from Wanlin — 12-year Chinese smart fire IoT manufacturer, WL-SFP300 certified UL 217/UL 268/UL 2034/UL 864/CE/EN14604/EN54/FCC. Key specs: Addressable FACP + Loop Controller + 4G LTE Cat.1 + Touchscreen + CAN Bus, 4G LTE Cat.1 + IoT Cloud Platform + Addressable Loop (252 devices/loop) + RS485 + Modbus + BACne···