Compatible with Arduino, this TDS sensor is designed for measuring water TDS values, which can indicate water purity and cleanliness. Suitable for use in domestic water quality testing applications. Compatible with 5V and 3.3V control systems. Features an AC excitation source to effectively prevent probe polarization. Equipped with a waterproof probe for long-term immersion in water during measurement. Arduino compatible with Gravity interface for simple, plug-and-play connection without soldering. Signal Interface: Input voltage: 3.3–5.5V Output signal: 0–2.3V Working current: 3–6mA TDS measurement range: 0–1000ppm TDS measurement accuracy: ±10% F.S. (at 25°C) Module interface: PH2.0-3P Electrode interface: XH2.54-2P TDS Probe: Number of probes: 2 Overall length: 83cm Connection interface: XH2.54-2P Color: Black Material: Plastic Size: 4.3 x 3.3cm Package Contents: 1 x TDS signal interface 1 x Waterproof TDS probe 1 x Gravity 3PIN analog sensor Note: Light and display differences may cause slight color variations between the product image and actual item. Measurement error allowed within ±1–3cm.