Description TDS Meter V1.0 Development Board for Water Meters Wide Input Voltage Range: 3.3–5.5 V Good Output Compatibility: Analog signal from 0–2.3 V, compatible with 5 V or 3.3 V controllers AC Excitation Source: Effectively prevents probe polarization Waterproof Probe Easy Operation: Compatible, simple connection, plug & play without soldering Signal Transmission Board: Input Voltage: 3.3–5.5 V Output Voltage: 0–2.3 V Operating Current: 3–6 mA TDS Measurement Range: 0–1000 ppm TDS Measurement Accuracy: ± 10% of full scale (25 °C) Module Size: 42 x 32 mm Module Interface: PH2.0-3P Electrode interface: XH2.54-2P TDS probe: Number of needles: 2 Total length: 83 cm Connection interface: XH2.54-2P Other: Waterproof probe Output voltage: 0–2.3 V analog signal, compatible with 5 V or 3.3 V regulators Signal transmission board: AC excitation source to prevent probe polarization and extend probe life TDS probe: Waterproof, with 2 needles and 83 cm total length Other: -based design for easy installation Caution: 1. The probe must not be used in water above 55 °C. 2. The probe must not be placed too close to the edge of the container, as this may affect the measurement. 3. The probe head and cable are waterproof, but the connector and signal transmission board are not. Please handle with care. Color: As shown Material: Printed circuit board (PCB) Package includes: 1 Set * TDS Meter V1.0 Development Board Only the above package contents, other products are not included. Note: Light reflections and different screen settings may cause the color of the item in the picture to be slightly different from the original. The measurement deviation is +/- 1-3 cm.