ultra-low power fire sensor

Wanlin Fire - China source manufacturer for women's shelter fire alarm. Featured model WL-TH-GW (IoT Gateway & Cloud Platform): LoRaWAN gateway, 8-channel downlink; Receiver sensitivity -137 dBm, 10,000+ nodes capacity; Cloud dispatch: push / SMS / email / voice call to duty phones; -20 to +60 deg C, 10-95% RH. Full lineup: smoke and heat detectors, CO and g···