Algae Online Analyzer in-depth Demand Report

The online turbidity meter is often used to measure the turbidity of the backwash water of the filter tank in the waterworks, the measurement of the turbidity of the raw water and the effluent of the sedimentation tank; the measurement of the water quality of the industrial production process and the circulating cooling water.

The application range of the online turbidity meter and the haze meter are different. The haze meter mainly measures the ratio of the scattered light flux and the transmitted light flux when the parallel light deviates from the incident direction when the light passes through the medium; while the online turbidity meter measures the main It is the degree of turbidity of the water, which is the turbidity caused by the trace amount of insoluble suspended substances and colloidal substances in the water.

There is also a big difference in the application, working principle and price of online turbidity meter and haze meter. Let's introduce them one by one.

Different application industries:

The main application industries of haze meter are plastics, glass, film, display processing, packaging industry, liquid medicine analysis and other industries;

The main application industries of turbidimeters are water plants, power plants, industrial and mining enterprises, which mainly involve laboratory analysis and testing related to water quality and environmental protection. Most water plants have turbidimeters.

Different measurement principles:

1. Working principle of haze meter

Haze expresses the degree of blurring of transparent samples. The greater the haze, the more blurred the object is when seen through the material, and vice versa. Transmittance is a parameter that expresses the ability of a material to pass light. Transmittance is the ratio of transmitted light (that is, all the red part of the integrating sphere in Figure 1) to the incident light (that is, all the blue light before passing through the sample); haze is the wide-angle scattered light (in the integrating sphere > ± The scattered light at 2.5° angle) is higher than the transmitted light, that is, all the green parts in the integrating sphere in Figure 2 are higher than all the red parts in the integrating sphere in Figure 1 above.

2. Working principle of turbidimeter

The turbidimeter uses the 90° scattered light principle. When the parallel light beam from the light source passes through the solution, part of it is absorbed and scattered, and the other part is transmitted through the solution. The scattered light intensity in the direction of 90° to the incident light conforms to the Relais formula:

Isu003d((KNV2)/λ)×I0

Where: I0: incident light intensity, Is: scattered light intensity, N: the number of particles per unit solution, V: particle volume, λ: incident light wavelength, K: coefficient

Under the condition of constant incident light, in a certain turbidity range, the intensity of scattered light is proportional to the turbidity of the solution. The above formula can be expressed as Is/I0u003dK′N (K′ is a constant)

According to this formula, the turbidity of a water sample can be measured by measuring the scattered light intensity of particles in the water sample.

The composition of the internal optical system is different:

The optical system of the turbidimeter consists of a tungsten lamp, a scattered light 90° detector, and a transmitted light detector;

The haze meter consists of a 154mm integrating sphere, a concave grating, a 256-pixel CMOS detector, and a 360~780nm combined LED light source.

Market sale price is different:

The price of haze meter and turbidity meter varies greatly. The price of haze meter is usually tens of thousands of yuan, while the price of turbidity meter is between several hundred to several thousand yuan. From this, it can also be seen that there is a gap between the requirements and composition of the internal structure and optical components between the haze meter and the turbidity meter.

Different appearance and function:

The appearance of the haze meter looks relatively large, and it also has a large color screen. The function of the haze meter can achieve various optical indicators (haze, transmittance, chromaticity, color difference, yellowness, etc.) according to industry standards. Whiteness, Cobalt-Platinum Index, Gardner Index, etc.) accurate test.

The appearance of turbidimeters is usually relatively small, and the functions that can be detected are relatively small.

In general, the difference between a haze meter and a turbidity meter is quite large, and the application scenarios are also different. The correlation is that after the light enters the medium, the value of the scattered light flux is measured.

Portable and online turbidity meters measure the optical clarity of a liquid by quantifying the amount of light scattering caused by particles in suspension. The clarity of a fluid is an important parameter to monitor, particularly in industries such as water treatment, brewery, and food processing, where the presence of suspended solids can have a significant impact on the quality and safety of the final product. While both portable and online turbidity meters have their own advantages, each system differs in terms of functionality, accuracy, and convenience. In this article, we will explore the key differences between portable and online turbidity meters to help you choose the best system for your application.

Understanding the basics of portable turbidity meters

Portable turbidity meters are handheld instruments that can be carried between sites to measure turbidity on-the-go. They are battery operated, and some models come with a rechargeable battery to reduce operational costs. Portable meters are often used for fieldwork applications, where measuring turbidity in the field is essential. They are also useful in small-scale operations where it is not economically feasible to install a full-scale online monitoring system.

The benefits of portable turbidity meters

One of the main advantages of portable turbidity meters is their portability, which allows them to be used in remote locations where access to power is limited. Portable meters are also easy to use, and their simple design allows minimally trained personnel to obtain accurate turbidity measurements. Additionally, portable turbidity meters are usually less expensive than online systems, making them a more cost-effective choice for small- to medium-sized companies.

The limitations of portable turbidity meters

While portable turbidity meters are reliable, they do have some limitations. Due to their handheld design, manual operation and handling of the instrument can be prone to user errors, which may lead to inaccurate readings. Another significant limitation of portable turbidity meters is their range of measurement. Portable meters typically have a lower measurement range than online models, which limits their application in certain industries, such as water treatment.

Understanding the basics of online turbidity meters

Online turbidity meters are installed in process monitoring systems, eliminating the need for manual measurement and reducing the risk of human error. They are electromechanical devices that measure turbidity continuously, providing real-time data that can be transmitted to a control room or laboratory. Online meters are designed for applications that require a high level of accuracy and consistency.

The benefits of online turbidity meters

Online turbidity meters offer several advantages over their portable counterparts. Since they are installed permanently in the process system, they provide continuous measurement with minimal effort, allowing for better process control. Online meters also have a much wider measurement range than portable models, making them suitable for applications that involve higher levels of turbidity. They are also more accurate than portable meters, with precision that exceeds regulatory requirements.

The limitations of online turbidity meters

While online turbidity meters offer many benefits, they do have some limitations. They are not portable, which means they cannot be moved between sites for use in different locations. Online meters can also be expensive to install and maintain, which limits their application in smaller operations. Additionally, the installation of online meters can be complicated, requiring additional control hardware and wiring.

Which turbidity meter is right for you?

Choosing the right turbidity meter depends on several factors, including your application, budget, and location. Portable turbidity meters are best suited for fieldwork, process development, and small-scale operations, whereas online turbidity meters are better suited for continuous, high-precision monitoring in larger operations. If you need a quick, low-cost measurement, a portable turbidity meter may be suitable for your needs. However, if accuracy and consistency are paramount, an online turbidity meter is the better choice.

Conclusion

Both portable and online turbidity meters have their own set of advantages and limitations. Therefore, before purchasing a turbidity meter, it is essential to define the necessary performance criteria and the measurement range required for your application. By understanding the key differences between portable and online turbidity meters, you can choose the option that best meets your needs.