Feature: 1. Water Tester: Detect how many milligrams of soluble solids are dissolved in one litre of water and show the quality. 2. Simple Using: Waterproof probe with long wire enables easy operation, just plug and play, saving your working time. 3. Accurate Use: The TDS measuring range is 0-1000ppm, and the measurement has high accuracy, which is very reliable. 4. Wide Utility: Can measure conductive substances, can test water quality in domestic water and hydroponics as well. 5. Good Material: Mainly made of high quality PCB, has excellent durability for long term use. Specification: Item Type: TDS Sensor Module Material: PCB Function: Water conductivity sensor. Output Signal: 0~2.3V Working Current: 3~6mA TDS Measuring Range: 0~1000ppm Module Interface: XH2.54-3P Electrode Interface: XH2.54-2P. Package List: 1 x TDS Sensor Module1 x Waterproof TDS Probe1 x Analogue Sensor Line Note: 1. The TDS probe cannot be used in water above 55℃. 2. The TDS probe should not be placed too close to the edge of the container, which will affect the display. 3. The head and lead of the TDS probe are waterproof and can be immersed in water, but the connection interface and signal transfer board are not waterproof. Please pay attention to use.