Understanding Turbidity Sensors: What They Are and How They Work

Turbidity sensors are devices used to measure the cloudiness or haziness of a liquid caused by suspended particles. These sensors are commonly used in water treatment plants, wastewater treatment facilities, and other industries where monitoring the clarity of liquids is important. Understanding how turbidity sensors work and what they can measure is essential for ensuring the quality and safety of water and other liquids.

Model EC-510 Intelligent conductivity meter
Range 0-200/2000/4000/10000uS/cm
Accuracy 1.5%(FS)
Temp. Comp. Automatic temperature compensation
Oper. Temp. Normal 0~50℃; High temp 0~120℃
Sensor C=0.01/0.02/0.1/1.0/10.0cm-1
Display LCD Screen
Communication 4-20mA output/2-10V/1-5V/RS485
Output High/Low limit dual relay control
Power AC 220V±10% 50/60Hz or AC 110V±10% 50/60Hz or DC24V/0.5A
Working Environment Ambient temperature:0~50℃
Relative humidity≤85%
Dimensions 48×96×100mm(H×W×L)
Hole Size 45×92mm(H×W)
Installation Mode Embedded

Turbidity sensors work by shining a light source, typically an LED, into a liquid sample. The light is then scattered by the suspended particles in the liquid, and a photodetector measures the amount of light that is scattered. The amount of light scattered is directly proportional to the concentration of particles in the liquid, with higher concentrations of particles resulting in more light scattering. This information is then converted into a turbidity reading, typically measured in nephelometric turbidity units (NTU).

Turbidity sensors can measure a wide range of turbidity levels, from very low levels in clean drinking water to very high levels in heavily polluted water. They are also capable of detecting changes in turbidity over time, making them useful for monitoring water quality and detecting potential issues such as sediment buildup or contamination.


One of the key advantages of turbidity sensors is their ability to provide real-time data on the clarity of a liquid. This allows operators to quickly identify and respond to changes in turbidity, ensuring that water treatment processes are running smoothly and that water quality standards are being met. Turbidity sensors can also be used to automate processes such as backwashing filters or adjusting chemical dosing, saving time and reducing the risk of human error.

In addition to monitoring water quality, turbidity sensors can also be used in research and environmental monitoring applications. For example, researchers may use turbidity sensors to study sediment transport in rivers or to monitor the impact of pollution on aquatic ecosystems. By providing accurate and reliable data on turbidity levels, these sensors can help scientists better understand and protect our natural resources.

When selecting a turbidity sensor, it is important to consider factors such as the range of turbidity levels it can measure, its accuracy and precision, and its compatibility with the liquid being measured. Some sensors may be better suited for clean water applications, while others may be designed for more challenging environments with high levels of suspended solids.

Model pH/ORP-8500A pH/ORP Online Meter
Range pH:0.00~14.00 ; ORP:(-1999~+1999)mV; Temp.:(0.0~100.0)°C (Temp.Compensation: NTC10K)
Resolution pH:0.01 ; ORP: 1mV; Temp.:0.1°C
Accuracy pH:+/-0.1 ; ORP: +/-5mV(electronic unit); Temp.: +/-0.5°C
Temp. compensation NTC10K Temperature compensation
Medium Temp. (0~80)°C
Analog output Double channels isolated; transportable(4~20)mA, instruments/ transmitter mode
Control Output Triple channels semiconductor photoelectric switch, load current: AC/DC 30V, 50mA(max)
Communication port RS485,Modbus RTU protocol
Working Environment Temp.(0~80)℃; relative humidity <95%RH (non-condensing)
Storage Environment Temp.(-20~60)℃;Relative Humidity ≤85%RH (none condensation)
Power Supply DC 24V
Power consumption <3W
Protection level IP65 (with back cover)
Dimension 96mmx96mmx94mm(HxWxD)
Hole Size 91mmx91mm(HxW)

Overall, turbidity sensors play a crucial role in ensuring the quality and safety of water and other liquids. By providing real-time data on turbidity levels, these sensors help operators monitor and control water treatment processes, detect potential issues, and protect the environment. Whether used in a water treatment plant, research laboratory, or industrial facility, turbidity sensors are an essential tool for maintaining clean and clear liquids.

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