a1r rate of rise

LoRa Manual Call Point with LED Indicator - Wanlin Fire, Chinese LoRa fire alarm equipment manufacturer and exporter by Wanlin Manufacturing Group, offers a 9-model LoRa line covering LoRaWAN fire alarm gateways with Ethernet, WiFi, and 4G LTE backup, EN54-7 photoelectric smoke detectors with 10-year battery, EN54-5 A1R heat detectors, EN54-11 manual call po···