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This section provides an overview for mlss meters as well as their applications and principles. Also, please take a look at the list of 11 mlss meter manufacturers and their company rankings. Here are the top-ranked mlss meter companies as of January, 2025: 1.Meacon Automation, 2.Royce Water Technologies Pty Ltd, 3.MULTI MEASURING INSTRUMENTS Co., Ltd..
Table of Contents
An MLSS Meter is a device that measures the concentration of suspended solids (SS) in a liquid.
It is mainly used in the field of water treatment. In sewage treatment, the activated sludge method, which is a biological treatment using activated sludge, is generally used.
MLSS stands for "Mixed Liquor Suspended Solids" and refers to the suspended solids in the mixture of sewage and return sludge that flows into the treatment system.
MLSS Meter is used in the water treatment field to control the function of the activated sludge process. MLSS concentration is an important maintenance standard for activated sludge treatment facilities.
The activated sludge method uses bacteria that use organic matter as a nutrient source. If there is too much organic matter in relation to the amount of microorganisms, not only will the organic matter not be fully decomposed, but the bacteria will also divide excessively and the settling of flocs will deteriorate. Conversely, if there is not enough organic matter, it is known that the floc will collapse due to self-digestion, thus worsening the settling ability of the floc.
By measuring MLSS concentration, which is an indicator of microbial content, and managing it in accordance with the amount of organic matter, the treatment facility can function at its best.
MLSS Meter is a device to measure MLSS concentration by utilizing the light scattering phenomenon. When light is incident on a liquid containing MLSS, the light is scattered by MLSS. As the MLSS concentration increases, the amount of transmitted light decreases, while the amount of scattered light increases.
For this reason, the MLSS concentration can be determined by knowing the amount of transmitted light, scattered light, or both. Most MLSS meters on the market use either the transmitted light measurement method or the scattered light measurement method.
In the transmitted light measurement method, light from a light source lamp is incident on the MLSS-containing liquid introduced into the measurement cell, and transmitted light is measured. Since fluctuations in the amount of incident light can cause measurement errors, the system is designed to maintain a constant amount of light from the light source by installing a light receiver.
In the scattered light measurement method, light is incident directly on the liquid to be measured, and the scattered light is measured by the MLSS. As with the transmitted light measurement method, fluctuations in the amount of incident light can cause errors. Therefore, a double scattered light comparison method using two photodetectors is used.
There are various measurement principles of MLSS meters, such as the membrane filter method and the solids rotation method. It is important to select the appropriate principle according to the purpose and application. Select the best one considering accuracy, reproducibility, ease of operation, and other factors.
Select an MLSS Meter with a measurement range suitable for the MLSS range of the target water treatment process, which typically ranges from a few mg/L to several g/L. Ensure that the measurement range matches the requirements of your process.
The accuracy and reliability of MLSS meters are essential for accurate data collection and process evaluation. Selecting an MLSS Meter with high accuracy and reliability will ensure accurate data. In addition, selecting a highly reliable manufacturer and product will ensure stable measurements over a long period of time.
It is important to select an MLSS Meter that is simple to operate and easy to use. Selecting an MLSS Meter that can be easily calibrated and maintained on a regular basis will help maintain accurate measurements and stable performance.
General measurement procedure of the MLSS Meter:
1. Turn on the power.
2. Place the probe in the test water and submerge it until the sensor is submerged.
3. Hold the reading steady, and when it stabilizes, read the indicated value. The indicated value varies from MLSS Meter to MLSS Meter, so multiply the indicated value by a constant or value according to your needs.
Some MLSS Meters have a wobble mitigation function for the indicated value.
How to measure the interface:
Interface measurement method using the interface lamp
When performing calibration of the MLSS Meter, follow the instructions below:
In addition, there are two methods of calibration as follows.
Actual solution calibration method
This is a calibration method in which the measured liquid is manually analyzed or measured with a reference instrument and adjusted to the obtained value. This calibration method is necessary for accurate MLSS measurements.
There are three calibration procedures for this method:
Simple Calibration Method
The simple calibration method uses a set of calibration plates. The calibration plate is attached to the detector immediately after the above actual solution calibration method is performed. The MLSS value at that time is written on the calibration plate.
The next calibration is performed to match the value recorded on the calibration plate. This calibration method is employed during routine maintenance. The calibration plate with the values already entered cannot be transferred to another MLSS Meter.
*Including some distributors, etc.
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Endress+Hauser Group Services AG, established in 1953 with headquarters in Reinach, Switzerland, is a global manufacturer, distributor, and integrator of industrial process solutions for flow, level, pressure, temperature, and digital communications. The company's product line includes portable pH meters, Raman spectroscopic analyzers, electromagnetic flowmeters, hydrostatic level sensors, and application managers (devices). These products are available individually, and custom-process manufacturing turnkey systems can be commissioned. The company serves industries including food processing, chemical processing, agriculture, mining, and energy.
Supmea Automation Co., Ltd., established in 2006 in China, is a notable manufacturer and supplier specializing in comprehensive industrial automation solutions. They supply diverse products like data loggers, pressure transmitters, and level sensors. With a history of innovation, Supmea serves various industries. Their strengths encompass cutting-edge technology and a widespread reach. Supmea's notable products, such as pressure transmitters for industrial processes and data loggers for remote monitoring, supply to streamlined operations and increased productivity.
HORIBA RADIO LABORATORY was established in Japan in 1945 and has spent the last three-quarters of a century growing as an R&D company and engaged in international operations. HORIBA Scientific offers 200 years of experience developing high-performance scientific instruments and analytical solutions. The HORIBA Group of worldwide companies provides an extensive array of instruments and systems for applications ranging from automotive R&D, process and environmental monitoring, in-vitro medical diagnostics, semiconductor manufacturing, and metrology to a broad range of scientific R&D and QC measurements. Operating in Asia, Europe, and North and South America, HORIBA scientific develops solutions that go beyond just products.
Multi Measuring Instruments Co., Ltd. was founded in Chiba, Japan in 1986 and is headquartered in Tokyo. As per its namesake, Multi offers a vast array of measuring and testing equipment used across a number of industries. Some of their offerings include voltage meters, network testers, lux meters, cable locators, sound meters, various thermometers, gas analyzers, and water quality meters. Multi Measuring Instruments has a mission for its products to improve the global environment by detecting inefficiencies and leaks, developing products that will be useful for solar and wind power generation.
Ranking as of January 2025
Derivation Method| Rank | Company | Click Share |
|---|---|---|
| 1 | Meacon Automation |
18.9%
|
| 2 | Royce Water Technologies Pty Ltd |
13.5%
|
| 3 | MULTI MEASURING INSTRUMENTS Co., Ltd. |
13.5%
|
| 4 | ZHOU ENSI LTD |
10.8%
|
| 5 | AIRA |
10.8%
|
| 6 | H-KORBI Co., Ltd. |
8.1%
|
| 7 | Supmea Automation Co.,Ltd. |
8.1%
|
| 8 | SNEW TRADING & SOLUTION SDN BHD |
5.4%
|
| 9 | Endress+Hauser Group Services AG |
5.4%
|
| 10 | Japan Agri Trading |
2.7%
|
Derivation Method
The ranking is calculated based on the click share within the mlss meter page as of January 2025. Click share is defined as the total number of clicks for all companies during the period divided by the number of clicks for each company.Number of Employees
Newly Established Company
Company with a History
*Including some distributors, etc.
*Including some distributors, etc.
| Country | Number of Companies | Share (%) |
|---|---|---|
|
China
|
2 | 22.2% |
|
Japan
|
2 | 22.2% |
|
United States of America
|
1 | 11.1% |
Australia
|
1 | 11.1% |
Malaysia
|
1 | 11.1% |
Indonesia
|
1 | 11.1% |
Republic of Korea
|
1 | 11.1% |
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