Insoluble particle detector for infusion set: principle and application analysis of photoresist method
In the modern medical field, the purity of drugs and medical devices is directly related to the safety and effectiveness of patient treatment. Especially for key medical supplies such as infusion sets and anesthesia equipment, the control of insoluble particles inside is particularly important. Therefore, according to the 2020 edition of the Chinese Pharmacopoeia and related standards, the principle of photoresist method has been widely used in the detection of insoluble particles in WLY-05S infusion set, becoming an important means to ensure the quality of medical products.
Overview of the principle of photoresist method
The photoresist method, as an efficient and accurate particle detection technique, relies on the scattering or blocking effect of light to identify and quantify tiny particles in liquids. When a liquid containing insoluble particles flows through a narrow inspection channel, a beam of incident light perpendicular to the flow direction of the liquid passes through the channel. These particles will partially block or scatter light, causing a decrease in the intensity of light received by the sensor, resulting in a signal change proportional to the cross-sectional area of the particles. Through precise circuit processing, this signal change is converted into quantifiable data, achieving accurate measurement of particle quantity and size.
Instrument characteristics and scope of application
The WLY-05S insoluble particle detector for infusion sets in Sanquan Zhongshi, Jinan, is designed based on the principle of the aforementioned photoresist method. It is not only suitable for detecting insoluble particles in drugs such as small and large injections, infusion solutions, and sterile powders as specified in the Chinese Pharmacopoeia, but also widely covers particle contamination detection in medical devices such as infusion equipment, anesthesia equipment, and drug packaging materials.
It is worth noting that although the instrument is powerful, it is not suitable for all types of liquids. Especially corrosive liquids, which may cause damage to the precision components inside the instrument, are listed as prohibited.

Testing standards and flexibility
In order to ensure the accuracy and reliability of the test results, Jinan Sanquan Zhongshi's WLY-05S infusion set insoluble particle detector strictly follows the Chinese Pharmacopoeia and other relevant international standards. The instrument is equipped with multiple specialized detection standards, covering different requirements for liquid particle pollution in various industries such as medical, pharmaceutical, and cosmetics. At the same time, in order to meet the specific needs of users, the instrument also supports user-defined standards, further enhancing the flexibility and practicality of detection.
In summary, the WLY-05S infusion set insoluble particle detector from Jinan Sanquan Zhongshi provides strong support for particle contamination detection of medical supplies and drugs based on its photoresist principle, combined with detection technology and flexible standard settings. It not only helps to improve the overall quality level of medical products, but also plays a role in promoting the healthy development of the medical industry.