Seeed Studio Industrial ECTDS Sensor is designed to measure the conductivity, salinity, and Total Dissolved Solids (TDS) in a liquid. This sensor provides Automatic Temperature Compensation (ATC) to make sure the data is accurate regardless of the temperature changes. The ECTDS features an IP65 rating, waterproof in a tight seal, and is capable of withstanding long-term constant use in professional application scenarios. This sensor offers low-power consumption, compact size, portability, high integration, and is suitable to be immersed in water for a long time. The ECTDS sensor makes use of the MODBUS-RTU RS485 serial communications protocol and is easily integrated with other devices such as data-loggers, controllers, and displays. This sensor is used in applications such as agriculture, hydro- and aquaponics, sewage treatment, research, and environmental monitoring.