Table of Contents
Understanding the Principle of Turbidity Sensor
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, breweries, and other industries where monitoring the clarity of a liquid is important. Understanding the principle behind how turbidity sensors work is essential for ensuring accurate and reliable measurements.
The principle of turbidity sensors is based on the scattering of light by particles suspended in a liquid. When light is shone through a liquid containing suspended particles, some of the light is absorbed by the particles, while the rest is scattered in different directions. 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.
Turbidity sensors typically use a light source, such as an LED, to shine light through the liquid, and a photodetector to measure the amount of light scattered. The sensor then calculates the turbidity of the liquid based on the intensity of the scattered light. This measurement is usually expressed in nephelometric turbidity units (NTU), which is a standardized unit for turbidity measurements.
| POP-8300 free chlorine online analyzer | ||
| System Model | POP-8300 free chlorine online analyzer | |
| Measurement configuration | (HClO)free chlorine.. | |
| total free chlorine/(ClO2)/pH/Temperature | ||
| \\u3000 | Free chlorine | (0.00-2.00)mg/L(ppm);\\u00a0\\u00a0 (0.00-20.00)mg/L(ppm) |
| Measurement | pH | 2.00-12.00 |
| range | Temperature | (0.0-99.9)\\u2103 |
| \\u3000 | Free chlorine | 0.01mg/L(ppm) |
| Resolution | pH | 0.01 |
| \\u3000 | Temperature | 0.1\\u2103 |
| \\u3000 | Free chlorine | Indication error 10% |
| Accuracy | pH | 0.1pH |
| \\u3000 | Temperature | \\u00b10.5\\u2103 |
| Sensor life | pH/free chlorine sensor | 12months(The service life is closely related to the measurement medium and maintenance frequency) |
| Communication interface | RS485 | MODBUS RTU communication protocol |
| \\u3000 | Number of channels | Double channels |
| (4-20)mA | Technical feature | Isolated, reversible, completely adjustable, instrument/transmitter dual mode |
| output | Channel configuration | Programmable point to Free chlorine, chlorine dioxide, Temperature, pH |
| \\u3000 | Loop resistance | 400\\u03a9(Max), DC 24V |
| \\u3000 | Transmission accuracy | \\u00b10.1mA |
| \\u3000 | Number of channels | Double channels |
| \\u3000 | Contact mode | The first and second for photoelectric switch |
| Control output | Load capacity | Load current 50mA(Max)\\uff0cAC/DC 30V |
| \\u3000 | Control point | Programmable function(Free chlorine, chlorine dioxide, Temperature, pH, Timing) |
| \\u3000 | Load capacity | Load current 50mA(Max)\\uff0cAC/DC 30V |
| \\u3000 | Control point | Programmable function(Free chlorine, chlorine dioxide, Temperature, pH, Timing) |
| Power supply | Connected to electric supply | |
| \\u3000 | AC80-260V;50/60Hz,compatible with all international | |
| \\u3000 | market power standards(110V;220V;260V;50/60Hz). | |
| Working environment | Temperature:(5-50)\\u2103\\uff1brelative humidity:\\u226485% RH(non condensation) | \\u3000 |
| Power Consumption | \\uff1c20W | |
| Storage environment | Temperature:(-20-70)\\u2103\\uff1brelative humidity:\\u226485%RH(non condensation) | |
| Installation | Wall mounted(with the preset back cover) | |
| Cabinet weight | \\u226410kg | |
| Cabinet dimension | 570*mm*380mm*130mm(H\\u00d7W\\u00d7D) | |
One common type of turbidity sensor is the nephelometer, which measures turbidity by detecting the amount of light scattered at a 90-degree angle from the light source. This angle is chosen because it provides a good balance between sensitivity to small particles and insensitivity to large particles. By measuring the scattered light at this angle, nephelometers can accurately determine the turbidity of a liquid across a wide range of particle sizes.
Another type of turbidity sensor is the turbidimeter, which measures turbidity by detecting the amount of light scattered at a 180-degree angle from the light source. This angle is chosen because it provides a more direct measurement of the total amount of light scattered by the particles in the liquid. Turbidimeters are often used in applications where a more precise measurement of turbidity is required.
In addition to nephelometers and turbidimeters, there are also other types of turbidity sensors that use different principles to measure turbidity. For example, some sensors use infrared light instead of visible light to measure turbidity, while others use ultrasonic waves to detect the presence of particles in a liquid. Each type of sensor has its own advantages and limitations, depending on the specific application requirements.
Overall, the principle of turbidity sensors is based on the scattering of light by particles in a liquid. By measuring the amount of light scattered, these sensors can accurately determine the turbidity of a liquid and provide valuable information about the clarity and quality of the liquid. Understanding how turbidity sensors work is essential for ensuring accurate and reliable measurements in a wide range of applications.