LoRaWAN water quality total hardness sensor is a type of sensor used to test the total hardness of water (measured as CaCO3), with automatic temperature compensation function, low environmental impact, and high measurement accuracy. Connect to the LoRaWAN collector through an aviation connector to achieve wireless communication. Widely used for online automatic continuous analysis and detection of water quality hardness in industrial wastewater, surface water, drinking water, seawater, and industrial production process control.