Features ★ MAIN USE: Compatible sensors are used to measure the value of water. This value can reflect the cleanliness of water and can be applied to water quality testing in the fields of domestic water use and hydroponics. ★ WATERPROOF PROBE: Our water conductivity sensor adopts a waterproof probe, which can be immersed in water for a long time and is very practical. ★ WIDE APPLICATION RANGE: Water conductivity sensors can be applied to water quality detection in fields such as domestic water use and hydroponics. With this sensor, you can easily DIY a detector to check the cleanliness of water and improve your water qu ★ EASY TO USE: The excitation source is an AC signal, effectively preventing probe polarization. Easy to use, excellent performance, small size, easy to carry and store. ★ EASY TO INSTALL: PCB board and cables are easy to install for immediate measurement for the water, time and effort saving. Specification: Item Type: Analog TDS Sensor Material: PCB Signal Adapter Board Input Voltage: 3.3-5.5V Output Signal: 0-2.3V Working Current: 3-6mA TDS Measurement Range: 0 to 1000ppm TDS Measurement Accuracy: ± 10% F.S. (25 ℃) Module Interface: PH2.0 3P Electrode Interface: XH2.54 2P TDS probe Number of Probes: 2 Overall Length: Approx. 83cm / 32.7in Connecting Interface: XH2.54 2P Other: Waterproof probe Package List:1 x Signal Adapter Board  1 x TDS Probe  1 x Connection Line   Package List 1 x Signal Adapter Board 1 x TDS Probe 1 x Connection Line