LoRaWAN water quality chloride ion sensor is a wireless monitoring device that can detect the concentration of chloride ions in water in real time. This device has automatic temperature compensation function, strong environmental adaptability, and high measurement accuracy. Wireless communication is achieved through the connection of aviation interface and LoRaWAN collector, which is widely used for online automatic continuous analysis and detection of ions in industrial wastewater, surface water, drinking water, seawater, and industrial production process control.