The wireless residual chlorine monitoring unit launched by Weichuan Technology is mainly used to measure the residual chlorine value of water quality. The residual chlorine electrode used in this product is a diaphragm polarographic (Clark) sensor with accurate and fast measurement characteristics. The wireless part adopts LoRa RF technology combined with LoRaWAN standard protocol for long-distance transmission, low power consumption, and quick integration with third-party business platforms. The product is suitable for online monitoring of residual chlorine concentration in pharmaceutical, environmental protection, tap water monitoring, drinking water, and industrial process water disinfection and sterilization processes. It can also be used in places such as swimming pools and aquaculture where residual chlorine concentration needs to be measured.