This product is a water quality chloride ion sensor using LoRa wireless communication technology, which has the characteristics of low power consumption, long-distance transmission, and strong anti-interference. Real time monitoring of chloride ion concentration in water bodies, data can be remotely uploaded to the monitoring platform through LoRa network without complex wiring, suitable for scenarios such as drinking water, industrial circulating water, sewage treatment, marine environment, etc. The sensor has fast response and high accuracy, supports battery power supply, is easy to deploy in the field or distributed, and helps with water quality safety and intelligent management.