Keyestudio TDS Sensor Meter V1.0 Board Module Water Meter Filter Measuring Water Quality for Arduino Unor 3 Feature: Keyestudio TDS sensor kit is compatible with Arduino controllers, plug and play, easy to use. It can be applied to measure TDS value of the water, to reflect the cleanline of the water. TDS (Total Diolved Solids) indicates that how many milligrams of soluble solids diolved in one liter of water. In general, the higher the TDS value, the more soluble solids diolved in water, and the le clean the water is. Therefore, the TDS value can be used as one of the references for reflecting the cleanline of water. Measuring the TDS value in the water is to measure the total amount of various organic or inorganic substances diolved in water, in the unit of ppm or milligrams per liter (mg/l). Its Electrode can measure conductive materials, such as suspended solids, heavy metals and conductive ions in water. The module comes with four 3.2mm fixed holes, easy to mount on any other devices. Specification: TDS instrument: Input voltage: DC 3.3 ~ 5.5V Output voltage: 0 ~ 2.3V Working current: 3~6mA TDS measurement range: 0 ~ 1000ppm TDS measurement accuracy: 10% F.S. (25) Module interface: XH2.54-3P Electrode interface: XH2.54-2P TDS probe: Number of needles: 2 Total length: 60cm Connection interface: XH2.54-2P Other: Waterproof probe Product size: 42*32*5mm Product weight: 25g Packing size: 150*100*20mm Package weight: 25g Note: Due to the different monitor and light effect, the actual color of the item might be slightly different from the color showed on the pictures. Thank you! Please allow 1-2cm measuring deviation due to manual measurement. 1 X TDS Sensor Meter