Seeed Studio Industrial EC and TDS Sensor measures conductivity, salinity, and Total Dissolved Solids (TDS) with temperature compensation with RS485 or analog voltage output signal. This sensor was designed with industry standards and the EC and TDS sensor (version B) comes with a waterproof aviation connector. The EC and TDS sensor is built with Automatic Temperature Compensation (ATC) that makes sure the data is accurate regardless of the temperature changes. This sensor is IP65 rated, waterproof in a tight seal, IP68 rated cover, and is capable of withstanding long-term constant use in professional application scenarios. Typical applications include agriculture, hydroponics and aquaponics, sewage treatment, research, and environmental monitoring.