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KS0414 Keyestudio Turbidity Sensor V1.0

The keyestudio turbidity sensor detects water quality by measuring level of turbidity.

The principle is to convert the current signal itself into the voltage output through the circuit.


Water turbidity refers to the degree of turbidity caused by suspended substances such as sand, clay, organic matter, plankton and microorganisms in the water. Industrial-grade turbidity sensors or turbidity meters are expensive, and the cost is too high in the designed of electronic products to be suitable for selection; therefore, we chose a turbidity sensor that is widely used in household appliances, washing machines and dishwashers. The sensor uses optical principles to comprehensively judge the turbidity condition through the light transmittance and scattering rate in the solution. Inside the sensor is an infrared pair tube. When light passes through a certain amount of water, the amount of light transmitted depends on the degree of pollution of the water. The more dirty the water, the less light is transmitted. The light receiving end converts the power of the transmitted light into a corresponding current. If the transmitted light is more, the current is large. 



  • Operating Voltage: 5V DC
  • Operating Current: 40mA (MAX)
  • Response Time: <500ms
  • Insulation Resistance: 100M (Min)
  • Output Method: Analog
  • Analog output: 0-4.5V
  • Digital Output: High/Low level signal (you can adjust the threshold value by adjusting the potentiometer)
  • Operating Temperature: 5℃~90 ℃



1. Using an Arduino Turbidity Sensor

2. How to measure the turbidity in water using Arduino


TS-300B High Quality Turbidity Sensor Detection Module Water Quality Test

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