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SUZHOU, China – November 20, 2025 – Suzhou Sujing Instrument Automatic Control Equipment Co., Ltd. (“Suzhou Sujing”) was honored to welcome a high-level delegation from TESSOL, Inc., a leading South Korean provider of measurement and validation solutions, on November 19, 2025. The visiting delegation included TESSOL’s CEO, the Sales Director, and the Head of Calibration & Validation. The visit aimed to evaluate Suzhou Sujing’s manufacturing capabilities and discuss potential strategic collaborations to expand market reach in South Korea. Caption: Executives from TESSOL and Suzhou Sujing pose for a group photo at the company headquarters.   Showcasing Manufacturing Excellence During the visit, the TESSOL team was given an extensive tour of our manufacturing workshops. As experts in the fields of validation and calibration, the guests paid close attention to our production environment, assembly precision, and rigorous quality control processes. The tour highlighted Suzhou Sujing’s core product lines, with a specific focus on: Air Particle Counters Liquid Particle Counters Photometers Surface Particle Counters Caption: TESSOL representatives inspecting the production line and examining the technical details of our particle counters.   High Praise and Future Cooperation Following the facility tour, the two parties held an in-depth business meeting. TESSOL’s technical leadership expressed high approval of our equipment, noting that the performance and accuracy of Suzhou Sujing’s instruments meet the stringent requirements of international standards. Given TESSOL’s strong foothold in the Korean pharmaceutical, biotech, and semiconductor sectors, their CEO expressed a strong intention to purchase our equipment and establish a long-term partnership. Both sides agreed that combining TESSOL’s validation expertise with Suzhou Sujing’s advanced instrumentation creates a powerful synergy for the market. Caption: Senior leadership from both companies discussing strategic partnership opportunities during the meeting.   Looking Ahead This visit marks a significant milestone in Suzhou Sujing’s international expansion strategy. We look forward to a fruitful partnership with TESSOL, bringing our high-quality cleanroom testing solutions to a broader range of customers in South Korea and beyond.

Description: Are you getting false positives in your cleanroom? A Zero-Count Test is essential for accurate particle monitoring. Learn the step-by-step procedure and troubleshooting tips here.   In the field of cleanroom monitoring, data accuracy is everything. A single false count can lead to failed certifications, stopped production lines, or costly investigations. But how do you know if the particles shown on your screen are real contaminants or just "electronic noise"? The answer lies in the Zero-Count Test. This fundamental verification step is required by standards like ISO 21501-4 and JIS B 9921. It ensures that your airborne particle counter is not counting particles when the air is perfectly clean. Here is a professional guide on how to perform this test correctly to ensure your data integrity. What You Need Your Airborne Particle Counter (Handheld or Portable). A Zero Count Filter (usually rated at 0.2µm or better). A short, clean sampling tube (if applicable). Step-by-Step Procedure 1. Inspect the Setup Before starting, ensure the inlet of your particle counter is clean. Check the Zero Filter to make sure it is not clogged or damaged. If you are using tubing to connect the filter, ensure the tube is free of kinks and cracks.   2. Connect the Zero Filter Attach the Zero Filter directly to the inlet nozzle of the particle counter. Ensure the connection is tight. Any leakage at the connection point will introduce ambient air, causing the test to fail.   3. Purge the Sensor Do not start recording data immediately. When you first attach the filter, there is still "dirty" air trapped inside the sensor and the tubing. Run the instrument for 1 to 2 minutes (or take a few sample cycles) without recording data. This "purge" process flushes out residual particles from the optical chamber. 4. Run the Official Test Configure your instrument to run a standard test cycle. Duration: According to ISO 21501-4, the recommended testing time is often 5 minutes (or enough time to sample a specific volume of air). Observation: During this time, watch the display. 5. Analyze the Results What is the pass criteria? Ideally, the result should be 0 counts. However, most standards allow for a very small margin of error due to electronic noise (e.g., < 1 count per 5 minutes). If the count is consistently zero, your instrument’s optical sensor is clean, and the electronics are stable. What if the Test Fails? (Troubleshooting) If your counter shows particles while the Zero Filter is attached, don’t panic. Check the following: Loose Connection: This is the #1 cause of failure. Tighten the filter. Dirty Filter: Zero filters have a lifespan. If it has been used for years, it might be time to replace it. Sensor Contamination: If the instrument was recently used in a very dirty environment, the optical lens might need professional cleaning. Electronic Interference: Ensure the device is not placed near high-voltage machinery or strong electromagnetic fields. Performing a Zero-Count Test before crucial certification tasks (like HEPA filter leak testing or room classification) is a best practice for any QA professional. It takes only a few minutes but provides the confidence that your data is real and reliable.

Owning a high-precision particle counter is the first step in quality control, but ensuring it consistently produces accurate, consistent, and traceable data throughout its years of service depends on an indispensable safeguard: professional periodic calibration and maintenance. Like any precision instrument, a particle counter's performance can drift over time. The laser's intensity may slowly degrade, dust can accumulate on optical surfaces, and the sample pump's flow rate can subtly change—all of which directly impact measurement accuracy.   An annual calibration performed in accordance with the international standard ISO 21501-4 is a rigorous scientific process. It is far more than a simple comparison; it involves an "as-found" test of the instrument's initial state, a thorough cleaning of the optical and pneumatic systems, a precise calibration of particle sizing and counting efficiency using standard particles traceable to a National Metrology Institute (like NIST or NIM), and a correction of the sampling flow rate. Upon completion, you receive a detailed calibration certificate, which is the authoritative document needed to prove to auditors and regulatory bodies that your measurement equipment is in a state of control. The global calibration services offered by Suzhou Sujing are designed to help clients protect their equipment investment, mitigate compliance risks and production losses caused by inaccurate data, and serve as the critical link in maximizing the full lifecycle value of their instrument.

In the rigorous workflows of cleanroom validation and routine monitoring, the "human factor" is a critical variable impacting both data quality and operational efficiency. A complex, difficult-to-use instrument increases training costs and is more prone to operator error. Suzhou Sujing understands this well and is dedicated to elevating the user experience to new heights through superior industrial design. Our portable particle counters feature a 7-inch, high-resolution color touchscreen with a UI that adopts modern, smartphone-style icon-based and wizard-driven navigation. The logic is so clear that engineers and technicians can intuitively perform most operations without consulting a cumbersome manual. Users can easily customize sampling location names, create and save multi-step sampling plans, and recall them with a single touch for future tasks, dramatically improving the efficiency and standardization of repetitive work. Upon test completion, results are presented in clear tables and trend graphs, while the built-in thermal printer allows for immediate output of key data for on-the-spot record-keeping. Meanwhile, comprehensive, industry-compliant PDF reports can be effortlessly exported via USB or Ethernet, enabling seamless integration with Quality Management Systems. From the ergonomic handle to the long-life lithium battery that supports a full day's work, every detail is designed to reduce operator burden. This holistic approach can cut the total time for a single validation or inspection round by up to 50%, empowering professionals to focus more on data analysis and process improvement.

As the global energy revolution deepens, the demand for high-performance lithium-ion batteries is growing at an unprecedented rate. However, the cleanliness requirements for the production environments in this cutting-edge manufacturing sector are every bit as stringent as those in the traditional pharmaceutical and semiconductor industries. In the core processes of battery manufacturing, such as electrode coating, cell winding, and packaging, airborne micron-sized particles pose a significant safety hazard. Conductive metallic particles (like iron, copper, and nickel) are especially dangerous; if they land inside a battery cell during assembly, they act like a "micro-bomb." Such a particle can puncture the thin separator, causing a micro-short circuit between the anode and cathode. This can lead to abnormal self-discharge rates, rapid capacity decay, and even localized overheating during cycling, potentially triggering a dangerous thermal runaway event. Therefore, within the dry rooms that demand extremely low humidity and high cleanliness, implementing rigorous air particle monitoring is the first line of defense for ensuring product quality and safety. Suzhou Sujing's high-sensitivity particle counters provide real-time, precise capture and quantification of environmental contaminants. They help battery manufacturers validate the effectiveness of their environmental control systems (like FFUs) and identify potential contamination sources promptly. By maintaining an ultra-clean production environment, companies can significantly improve the consistency, safety, and cycle life of their battery products, thereby securing a competitive advantage in the fierce global market.

The European pharmaceutical industry is navigating a major transformation of its regulatory landscape—the full implementation of the new EU GMP Annex 1. At the heart of this new regulation is the establishment of a comprehensive "Contamination Control Strategy" (CCS), which emphasizes a scientific and risk-based approach. Particularly for Grade A aseptic core zones, the new rules mandate the systematic collection of a 1m³ air sample to obtain more representative environmental data. In this context, the 100 LPM (Liters Per Minute) flow-rate particle counter has transitioned from a "recommended option" to a "definitive choice" for ensuring compliance. Using a traditional 1 CFM (28.3 LPM) instrument to complete a 1m³ sample takes over 35 minutes. In aseptic operations where every second counts, such a prolonged monitoring period significantly increases the risk of operator intervention and environmental exposure. Suzhou Sujing's 100LPM portable particle counter slashes this process to a mere 10 minutes. This translates to less production downtime, a lower risk of human-induced contamination, and the ability to gather more monitoring data within the same timeframe, providing a more robust foundation for trend analysis and risk assessment. It is not merely a tool for meeting regulatory text but a strategic asset that empowers European pharmaceutical firms to optimize their CCS and elevate their sterility assurance levels.