Features [Long Term Use]: Waterproof probe can be immersed in water for a long time, with excellent workmanship and long service life [Simple Operation]: This water conductivity sensor is easy to connect, plug and play, no welding required, and is easy to use [Wide Applications]: The water conductivity sensor can be used for water quality testing in the fields of domestic water, hydroponics, and similar applications [Polarization Prevention]: Uses an AC signal as the excitation source, effectively preventing the probe from being polarized [Compatible Control System]: 0–2.3V analog signal output; compatible with 5V and 3.3V control systems Specification: Item Type: Water Conductivity Sensor Material: PCB Wide Voltage Operation: 3.3–5.5V 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. (25°C) Module Interface: XH2.54-3P Electrode Interface: XH2.54-2P TDS Probe: Number of Probes: 2 Overall Length: Approx. 60cm / 23.62in Connection Interface: XH2.54-2P Color: White Package List: 1 x Water Conductivity Sensor Note: 1. Probes cannot be used in water above 55°C. 2. The position of the probe should not be too close to the edge of the container, otherwise it may affect readings. 3. The probe head and wires are waterproof and can be immersed in water; however, the connection interface and signal transmission board are not waterproof.