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Suzhou Duolang Instrument Technology Co., Ltd

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Dual sensor closed-loop control: the precise water measurement method of Sartorius MA200
Date: 2025-12-19Read: 1

The MA200 is centered around 1000W focused microwave heating, dual sensing closed-loop control, and a 70g/0.1mg built-in analytical balance,
Complete high moisture sample detection in 40-120 seconds, suitable for liquid and paste samples with 8% -100% moisture content, balancing efficiency and compliance.


1、 Product positioning and core technology architecture


• Positioning:

Specially designed for industries such as food and beverage, chemical coatings, and environmental wastewater, focusing on rapid moisture/solid content analysis of high moisture samples,
It is an efficient tool for laboratory routine testing and production line control to solve the pain points of traditional drying methods that are time-consuming and cumbersome to operate.

Heating technology:
Equipped with a 1000W high-power microwave generator, the microwave chamber focuses energy and rotates the sample disk to achieve uniform heating,
The evaporation rate of water is 300 times faster than traditional drying methods, avoiding damage to sample components caused by local overheating.

• Accurate weighing unit:

Built in 70g range analytical balance, with a readability of 0.1mg, accurately calculates moisture content through weight difference method;
The weighing module is equipped with anti-static design, effectively reducing errors caused by sample adsorption.

Double closed-loop control:
Adopting a dual monitoring mode of "quality sensor+air humidity sensor" to automatically determine the endpoint of the sample's constant weight,
Simultaneously supporting user-defined weight loss rate and timing mode, ensuring dual reliability of results.

• Operation and interaction:
5.7-inch 1/4VGA touch screen+two key shortcut operation, supporting three control modes: key, touch screen, and external keyboard;
Built in 5 languages, intuitive menu structure, and can be used for routine testing without professional training.


2、 Key technical parameters


The instrument weighs 70g, with a moisture content measurement range of 8% -100% and a reading accuracy of 0.001%; The analysis time only takes 40-120 seconds (due to slight differences in sample type and moisture content);
The heating temperature can be adjusted in increments of 1 ℃ within the range of 30 ℃ -180 ℃, to meet the thermal stability requirements of different samples;
The body size is 510mm × 535mm × 304mm, with a weight of approximately 22kg, balancing performance and laboratory space adaptability.


3、 Core functions and application advantages


Efficient and rapid analysis:
Microwave heating directly acts on the moisture molecules of the sample, greatly reducing the drying time from several hours in traditional drying methods to minutes or even seconds, significantly improving the detection throughput.

Multi mode result output:
Supports 8 result display modes including% moisture, ppm moisture,% volatile components,% dry weight (solid content), ppm dry weight, etc., without additional calculations, directly meeting different reporting needs.

• Massive program storage:
It can store 320 sets of custom programs, preset parameters such as heating temperature and endpoint determination conditions for different samples, and does not require repeated settings when switching sample types, suitable for multi variety batch testing scenarios.

Compliance and Data Transmission:
Built in low-noise thermal printer, supports GLP compatible format output, automatically records traceability data such as sample ID, detection time, calibration information, etc; Equipped with RS232 and Ethernet interfaces for easy data export to computers or LIMS systems.

• Durability and safety:
The sample room adopts EMI protection sealing and safety lock design to prevent microwave leakage; The body has a chemically corrosion-resistant surface and is equipped with an easy to clean structure to reduce residual contamination of samples and extend the service life of the instrument.


4、 Typical application scenarios


Food and beverage industry:
Detect paste samples such as milk, yogurt, jam, sauce, as well as high moisture ingredients such as tomatoes and fruit vegetable mixtures, quickly control the moisture content during the production process, and ensure product taste and shelf life.

Chemical and Coatings Industry:

Analyze the solid content of water-based coatings, adhesives, resins and other samples, adjust the production line formula and quality control to avoid affecting product performance due to excessive moisture.

Environmental protection industry:

Measure the moisture content of sewage sludge, mud and other samples to provide rapid data support for optimizing sludge treatment processes and environmental compliance testing.

• Pharmaceutical and daily chemical industry:

It is applicable to the moisture detection of ointments, lotion, mouthwashes and other products to meet GMP compliance requirements and ensure product stability and effectiveness.


5、 Key points for installation, use, and maintenance

1. Installation should be carried out on a level, vibration free, and away from strong electromagnetic fields and flammable and explosive materials. The distance between the instrument and the wall should not be less than 20cm, and a heat dissipation space of at least 1 meter should be reserved at the top; Before use, it should be left in the environment for 2 hours and preheated for 30 minutes after turning on the machine.

2. The sample should be placed in a glass fiber membrane sample tray to avoid direct contact between the liquid and the weighing unit; Ensure that the sample chamber cover is closed and locked before testing to prevent microwave leakage and result deviation.

3. Calibration requires the use of a 50g E2 level calibration weight and regular verification of weighing accuracy; The instrument supports automatic calibration prompt function, and it is recommended to check at least once a week based on usage frequency.

4. When cleaning, disconnect the power supply and use a mild cleaning agent to wipe the sample chamber and casing, avoiding the use of strong chemicals; The sample tray and support frame can be disassembled for cleaning, dried, and then reinstalled to prevent liquid residue from damaging the components.

5. When not in use for a long time, the power should be turned off, the protective plug in the sample room should be removed and stored properly, and the instrument should be kept in a dry environment; Two people need to cooperate during transportation to avoid severe vibrations affecting weighing accuracy.


VI. Summary

The Sartorius MA200 (LMA200PM) balances analysis efficiency, result accuracy, and operational convenience through a combination of "microwave rapid heating+precise weighing+dual quality control" technology.
Whether it is the efficiency improvement of batch testing in the laboratory or the rapid response of real-time central control in the production line, it can provide reliable support and become a device for high moisture sample moisture analysis, helping users build efficient and compliant testing workflows.