heat detector for tunnel

ODM temperature sensor supplier direct from Wanlin Fire Protection — 12-year factory experience, WL-HD904 fully certified UL 521/EN 54-5/CE/FCC/RoHS/REACH. Key specs: LoRaWAN 868/915MHz, Fixed Temperature Sensor + LoRaWAN Long-Range Module, 3-year replaceable battery (2x C lithium). MOQ 100 units, 25-30 working days, OEM/ODM custom branding available. Servin···

4G heat detector with app direct from Wanlin Fire Protection — 12-year factory experience, WL-HD902 fully certified UL 521/EN 54-5/CE/FCC/RoHS/REACH. Key specs: 4G LTE Cat.1 + WiFi + RF 433MHz, Photoelectric Smoke + Fixed Temperature Heat Dual Sensor, 10-year sealed lithium battery. MOQ 100 units, 25-30 working days, OEM/ODM custom branding available. Servin···