TDS Meter V1.0 Module Water Quality Sensor for Arduino

The TDS Meter V1.0 Module Water Quality Sensor for Arduino is designed to measure the approximate Total Dissolved Solids level of water and provide an analog signal that can be processed by a microcontroller.

The module features a wide 3.3–5.5V DC operating range and a 0–2.3V analog output, allowing it to work with many Arduino-compatible and other 3.3V/5V control systems.

The included 60cm waterproof probe uses two sensing needles and connects to the module through an XH2.54-2P interface. The AC excitation method helps reduce electrode polarization compared with DC excitation, supporting stable sensor operation.

Features

• TDS measurement range of 0–1000ppm
• 3.3–5.5V DC operating voltage
• 0–2.3V analog output
• Compatible with 3.3V and 5V control systems
• Approximately 3–6mA working current
• AC excitation for reduced probe polarization
• Waterproof two-needle probe
• 60cm probe cable
• Arduino compatible
• XH2.54 connectors
• Plug-and-play connection without soldering
• Compact module size
• Suitable for long-term water monitoring applications

Applications

• Arduino water-quality projects
• DIY TDS meters
• Domestic water monitoring
• Hydroponics
• Aquaculture-related monitoring
• Water-quality experiments
• IoT water monitoring systems
• Data logging projects
• Educational electronics projects
• DIY environmental monitoring

How It Works / How to Use

1. Connect the TDS probe to the module using the XH2.54-2P connector.
2. Connect the module's power and analog output to a compatible Arduino or microcontroller.
3. Supply the module with 3.3–5.5V DC.
4. Read the analog output using the controller's analog input.
5. Use appropriate TDS conversion/calibration software to calculate the TDS value.
6. For improved measurement consistency, follow the sensor's recommended calibration procedure and account for water temperature where applicable.

Important Notes

• The stated measurement range is 0–1000ppm.
• Accuracy is specified as ±10% F.S. at 25°C.
• TDS measurement is affected by water temperature, calibration, probe condition, and the characteristics of the water being measured.
• This is an electronics development sensor and should not be treated as a laboratory-grade water-quality instrument.
• Keep the electronic module itself away from water; only the intended waterproof probe should be immersed.
• Clean and maintain the probe as needed for consistent readings.
• Do not exceed the specified 3.3–5.5V DC supply range.
• Product dimensions and weight may have minor variations due to manual measurement and manufacturing batches.
• Product images are for illustration purposes and the actual product may vary slightly.

Package Includes

• 1 × TDS Meter V1.0 Module Water Quality Sensor for Arduino