DFRobot Gravity Analog Turbidity Sensor

Turbidity measures how cloudy water is - suspended particles scatter light passing through the water, and this sensor detects exactly that scattering to produce a signal proportional to particle concentration, higher scatter meaning murkier water. That makes it a genuinely different measurement from pH or TDS sensors, which say nothing about physical clarity, so a complete water-quality monitoring setup often uses turbidity alongside those other readings rather than instead of them.

Dual analog and digital output modes give flexibility in how a project uses the reading - the analog output for tracking gradual clarity changes over time, or the digital output with its adjustable threshold for a simple clean/dirty alert without needing to process a continuous analog signal in code. A fast sub-500ms response time means it tracks genuinely changing conditions rather than lagging behind them, useful in a flowing water system rather than only static samples.

Common uses are aquarium and pond water clarity monitoring, water treatment and filtration system feedback loops, and environmental water-quality research projects tracking turbidity alongside other DFRobot Gravity-series water sensors.