Analog TDS Water Quality Sensor Module V1.0

The Analog TDS Water Quality Sensor Module V1.0 is a conductivity-based water quality sensor that measures Total Dissolved Solids — the combined concentration of all inorganic salts, minerals, and dissolved particles in water — outputting a 0 to 2.3V analog voltage proportional to the TDS value from 0 to 1000 ppm at ±10% accuracy. The tds sensor module v1.0 operates from 3.3V to 5.5V DC, draws 3 to 6mA working current, and connects to an Arduino analog input pin for direct analogRead() measurement without additional signal conditioning.

The analog tds sensor works by measuring the electrical conductivity of the water between two probe electrodes — dissolved ions carry electrical charge, and higher ion concentration increases conductivity and raises the output voltage. The tds sensor module V1.0 firmware converts the analog voltage to ppm using a temperature-compensated calibration formula available in the DFRobot TDS sensor Arduino library — uncalibrated readings at temperatures significantly above or below 25°C introduce additional error beyond the ±10% specification.

The analog tds sensor for arduino is most commonly used alongside the analog pH sensor module in Indian college hydroponics and water quality projects, where both TDS (nutrient concentration) and pH (acidity) are monitored together for complete water parameter reporting. the tds sensor probe electrodes polarise over time in highly conductive water — rinse the probe with distilled water and allow drying between measurements to prevent electrode contamination and calibration drift. Available from StemVolt, this module is ideal for makers building IoT water quality monitoring systems and practical water analysis embedded electronics projects.

Related Products:

• Checkout the Water Turbidity Sensor with Cable

Features:

• 0 to 1000 ppm TDS range covers drinking water and hydroponics
• 0 to 2.3V analog output directly readable by Arduino ADC pin
• 3.3V to 5.5V wide supply suits Arduino ESP32 and Raspberry Pi
• Low 3 to 6mA current suits battery-powered field water monitoring

Technical specifications:

 Applications:

• Analog TDS Sensor Module used for Arduino drinking water quality monitor
• College project uses tds sensor module for IoT water purity logger
• Hydroponics setup uses analog tds sensor to monitor nutrient ppm level
• RO filter system uses tds sensor for pre-post membrane TDS comparison
• Aquarium monitor uses analog tds sensor for arduino dissolved solids alert

Package includes:

• 1 x Analog TDS Water Quality Sensor Module