Recently, ISO released the new ISO 14644-21:2023 "Cleanrooms and related controlled environments: Suspended particle sampling techniques". This standard is associated with ISO 14644-1/2 and is in the form of a technical report for suspended particle sampling in cleanrooms. The purpose is to reduce sampling errors and particle losses. Some of the document contents include the following:

· Determination of suspended particle concentration

· Level confirmation

· Monitoring

· Other LSAPC (Light Scattering (Discrete) Suspended Particle Counter) applications

· Suspended particle sampling - considerations

· Instrument selection

· Particle size selection

· Required sampling volume and sampling flow rate

· Sampling location - considerations

· Sampling points for level confirmation

· Sampling points for monitoring

· Instrument measurement issues

Shenzhen Yitian Purification Technology Co., Ltd. was established in 2005. It is a national high-tech enterprise specializing in the research and development, production and sales of air purification related products. It provides industrial customers with a one-stop digital clean room solution of "detection, control and monitoring", covering the filtration, detection and monitoring systems of particulate matter, gaseous molecular pollutants, viruses and microorganisms. The company's main products include chemical filters, air filters, environmental testing instruments, air purification devices, intelligent online monitoring systems, etc.

We participated in the formulation of three national standards: "Analysis and Application of Clean Room and Related Controlled Environment Testing Technology", "Clean Room and Related Controlled Environment Part 9: Surface Cleanliness Classification by Particle Concentration" and "Technical Guidelines for Electrostatic Control in Clean Room Related Controlled Environments", and the formulation of the group standard "Technical Regulations for Online Testing of Clean Production Workshop Environment". From a practitioner to a participant in the compilation of clean industry standards, we lead the development of new products and technologies in the clean room controlled environment monitoring industry. We are a trustworthy choice!