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Pricelist: Retail Price (B2C) Pricelist
Analogue TDS Sensor Water Quality Sensor Module

Analogue TDS Sensor Water Quality Sensor Module

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FeatureDetails
Measurement Range0 to 1000 ppm
Output Signal0V to 2.3V Analog
Working Voltage3.3V to 5.5V DC
Accuracy±10% F.S. (at 25°C)
Probe Interface2-Pin XH2.54
Probe TypeWaterproof TDS Probe
Price
₹ 355.93 ₹ 355.93
(Tax included)

Product Description & Technical Details

Product Description The Analog TDS Sensor Module is a cost-effective solution for measuring the Total Dissolved Solids (TDS) in water. TDS indicates how many milligrams of soluble solids are dissolved in one liter of water; generally, a higher TDS level indicates more substances are present, meaning the water is less "pure." This kit includes a signal transmitter board and a waterproof TDS probe. It works by measuring the electrical conductivity of the liquid and converting it into an analog voltage. It is a staple at Robogears for building DIY water purifiers, hydroponic nutrient monitoring systems, and environmental sensing stations.

Key Highlights

  • Wide Voltage Compatibility: Supports both 3.3V and 5.5V power systems, making it directly compatible with Arduino (5V) and modern low-power MCUs like ESP32 or Raspberry Pi (3.3V).

  • Analog Output: Provides a simple analog voltage output that corresponds to the TDS value, allowing for easy integration using the analogRead() function.

  • Waterproof Probe: The high-quality probe can be immersed in water for long periods, though the transmitter module itself is not waterproof and must be kept dry.

  • Hydroponic Ready: Ideal for monitoring nutrient concentrations in hydroponic solutions, where maintaining a specific PPM (parts per million) is crucial for plant growth.

  • Simple Calibration: Features an onboard interface that allows for basic calibration to ensure readings remain accurate over time.

Technical Specifications

  • Working Current: 3 to 6 mA

  • TDS Probe Needle: 2 needles (Conductivity based)

  • Probe Length: ~60cm to 80cm

  • Module Size: 42mm x 32mm

  • Operating Temperature: 0°C to 50°C

Installation Tip from Robogears The TDS value is highly dependent on water temperature. For professional-grade accuracy, we recommend using this sensor alongside a DS18B20 Temperature Sensor to implement software-based temperature compensation. To calculate the TDS in your code, you will need to map the analog voltage using a specific formula (usually a quadratic equation) provided in the sensor's library. Important: Ensure the TDS probe does not touch the walls or bottom of the container during measurement, as this can affect the conductivity reading.

Note: This kit includes the transmitter module and the TDS probe. It is designed for hobbyist and educational use. Product images are for illustration purposes only.