Recently, a domestic laboratory equipment developer, in collaboration with a research team specializing in process equipment and control engineering from a chemical engineering university, has introduced a new magnetic drive stirrer featuring leak-proof performance. Utilizing innovative permanent magnet coupling drive technology, the device completely eliminates leakage risks associated with traditional mechanical seals when handling flammable, explosive, toxic, or hazardous reagents. It also improves stirring precision, offering a safe and efficient solution for high-risk reagent experiments in chemical, pharmaceutical, and environmental fields.

　　According to the R&D team, conventional laboratory stirrers often rely on mechanical seals, which are prone to wear and aging during prolonged high-speed operation or when exposed to highly corrosive reagents. This can lead to reagent leakage, resulting not only in experimental inaccuracies but also potential safety incidents such as fires or poisoning. Such risks are particularly critical when working with chlorinated solvents, highly toxic intermediates, or high-pressure reaction systems, forming a major bottleneck in conducting experiments involving hazardous substances.

　　The newly developed magnetic drive stirrer adopts an external-internal magnetic rotor configuration with synchronous permanent magnet drive, eliminating the need for a penetrating mechanical seal on the stirring shaft. This enables contact-free power transmission between the impeller and the external drive system, reducing leakage rates to below 0.001 mL/h and meeting the standard for inherent leak-proof performance. In addition, the stirrer is equipped with a high-precision speed control system, allowing stepless adjustment from 50 to 3000 rpm with speed fluctuation errors within ±1%. The impeller is constructed with a composite coating of Hastelloy and fluoropolymer, providing resistance to highly corrosive media such as aqua regia and concentrated nitric acid, and is operational across a temperature range of -40°C to 250°C.

　　In practical tests, the stirrer showed no signs of leakage after 100 hours of continuous operation in experiments involving nitrobenzene-based explosive reagents, while stirring uniformity improved by 18% compared to conventional devices. In wastewater treatment experiments containing heavy metal ions, the leak-free design prevented secondary contamination, achieving a data accuracy rate of 99.2%.

　　“The core advantage of this magnetic drive stirrer lies in its dual breakthroughs in safety and precision, making it particularly suitable for high-risk reagent reaction scenarios in laboratories,” stated Professor Chen Kai, the head of the R&D team. To date, more than 20 university chemistry laboratories and fine chemical companies have expressed procurement intentions. The next phase of development will focus on an upgraded version with online sterilization capabilities to meet the needs of sterile experiments in the biopharmaceutical sector, with a prototype expected to be tested within the year.