Feature: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.How to Use:Line Sequence: Black‑negative terminal, red‑positive terminal, green‑signal terminal.Specification:Item Type: Analog TDS Sensor ModuleProduct Material: Printed Circuit BoardApplication : Used to measure the TDS value of water, the TDS value can reflect the liness of the water, and can be used for water quality testing in the fields of domestic water, hydroponics, etc.Module Input Voltage: 3.3~5.5VModule Output Signal: 0~2.3VModule Working Current: 3~6mATDS Measurement Range: 0~1000ppmTDS Measurement Accuracy: ±10% F.S. (25℃)Module Size: Approx. 42 x 32mm / 1.7 x 1.3inModule Interface: PH2.0-3PElectrode Interface: XH2.54-2PNumber of Probe: 2Connection Interface: XH2.54-2POther: Waterproof Probe Package List:1 x Module1 x Probe1 x Wire