Item Type: Water Conductivity Sensor Signal Adapter Board Input Voltage: DC 3.3–5.5V Output Signal: 0–2.3V Working Current: 3–6mA Measurement Range: 0–1000ppm Measurement Accuracy: 10% F.S. (25°C) Size: Approx. 42 x 32mm / 1.7 x 1.3in Module Interface: XH2.54-3P Electrode Interface: XH2.54-2P Probe: Number of Probes: 2 Overall Length: Approx. 83cm / 32.7in Connection Interface: XH2.54-2P Color: White Feature: Waterproof probe Product Introduction: This device is designed for measuring general household water quality. Typical tap water readings are within 100ppm, while purified water is usually below 10ppm. The sensor measures total dissolved solids (TDS), which indicates the concentration of dissolved substances in water, expressed as milligrams per liter. Higher TDS values generally indicate a greater concentration of dissolved materials and lower water purity. Commonly used handheld testers are affordable and convenient but lack the ability to transmit data for long-term online monitoring or integration with control systems. While professional instruments offer high accuracy and data output, they are often costly. This sensor provides a practical solution by enabling direct connection to a controller for real-time water quality monitoring. The sensor is plug-and-play and compatible with both 3.3V and 5V control systems due to its wide input voltage range and analog output signal. It uses an AC excitation signal to prevent probe polarization, extend probe lifespan, and improve signal stability. The waterproof probe is suitable for continuous immersion in water. Applications include domestic water quality testing and hydroponic systems. With this sensor, users can build custom water quality monitoring solutions and easily assess water cleanliness for improved water management.