Features 1.The monitor module can measure the TDS value of water, and can be applied in the fields of domestic water, hydroponics, etc. 2.3.3~5.5V wide operation voltage, 2.0~2.3V analog signal output, compatible with 5V and 3.3V control systems. 3.Excitation source is AC signal, effectively preventing probe polarization, promising the accuracy. 4.This TDS sensor module has 2 waterproof probes, which can be immersed in water for long-term measurement. 5.The operation of the module is very easy. Simple connection, plug and play, no soldering required. Specification Item Type: Analog TDS Sensor Module Product Material: Printed Circuit Board Application : Used to measure the TDS value of water, the TDS value can reflect the cleanliness of the water, and can be used for water quality testing in the fields of domestic water, hydroponics, etc. Module Input Voltage: 3.3~5.5V Module Output Signal: 0~2.3V Module Working Current: 3~6mA TDS Measurement Range: 0~1000ppm TDS Measurement Accuracy: ±10% F.S. (25℃) Module Size: Approx. 42 x 32mm / 1.7 x 1.3in Module Interface: PH2.0-3P Electrode Interface: XH2.54-2P Number of Probe: 2 Connection Interface: XH2.54-2P Other: Waterproof Probe Package List 1 x Module 1 x Probe 1 x Jump Wire