Features 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. Wide Voltage Operation: 3.3~5.5V 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 Module 1 x Waterproof TDS Probe 1 x Analogue Sensor Line