DFRobot Gravity Analog TDS Meter Sensor – Waterproof Probe

The DFRobot Gravity Analog TDS Sensor is designed to measure the Total Dissolved Solids (TDS) level in water for quality monitoring applications. It outputs a stable 0–2.3V analog signal compatible with 3.3V and 5V microcontrollers such as Arduino. The module uses an AC excitation source to reduce probe polarization and improve measurement reliability. Equipped with a waterproof probe and Gravity plug-and-play interface, it ensures easy integration into embedded systems. Ideal for water quality testing, hydroponics, and domestic water monitoring systems.

• Analog TDS measurement module
  
• Wide input voltage 3.3–5.5V DC
  
• 0–2.3V analog signal output
  
• AC excitation to prevent probe polarization
  
• Waterproof immersion probe
• Gravity interface plug-and-play design
• Compatible with Arduino boards
• Supports 3.3V and 5V controllers
  
• Stable and repeatable measurements
• Compact control board layout
  
• Suitable for continuous monitoring systems

• Operating Voltage: 3.3–5.5V DC
  
• Analog Output Voltage: 0–2.3V
  
• Excitation Mode: AC signal
  
• Measurement Parameter: Total Dissolved Solids (TDS)
  
• Probe Type: Waterproof immersion probe
  
• Output Interface: Analog
  
• Compatible Controllers: 3.3V / 5V MCU
  
• Connection Type: Gravity 3-pin interface
  
• Recommended Temperature Range: 0–60°C
  
• Calibration: Software calibration supported
  
• Application Media: Fresh water

• Schematic
• Layout with Dimension
• CD4060BM96 Datasheet
• LMV324A-SR Datasheet
• DFRobot Gravity TDS Sensor Library(Github)

• TDS Meter using TDS & Temperature Sensor with Arduino || Measure Water Quality in PPM