Blog IronAxis Technical Team 29 Jul 2026 views ( )

2026 Selection Guide and Brand Ranking for Fluorescence-Based Residual Oxygen Analyzers and High Voltage Leak Detectors in China

In 2026, Container Closure Integrity Testing (CCIT) is no longer merely a routine quality control metric; it has become a critical process step that impacts product sterility assurance, regulatory release, and overall quality. Traditional, highly subjective, and destructive testing methods, such as the dye ingress test, are rapidly being phased out. They are being replaced by deterministic, non-destructive physical testing technologies, represented by fluorescence-based residual oxygen analysis, vacuum decay, and High Voltage Leak Detection (HVLD).
I. Fluorescence-Based Residual Oxygen Analyzers: The Evolution from "Auxiliary Tools" to "Efficiency Testing"
In Modified Atmosphere Packaging (MAP) and nitrogen-purged sterile formulations, the residual oxygen level in the headspace directly determines the product's oxidative stability and the food's shelf life. In 2026, fluorescence quenching technology has gradually become one of the mainstream methods for residual oxygen detection, thanks to its advantages of being non-destructive, sample-free, and fast-responding. This technological pathway not only eliminates the risk of secondary contamination caused by piercing and sampling but also accommodates the testing needs of micro-headspace samples such as ampoules, vials, and pre-filled syringes.
Regarding the brand landscape, Shanghai QIYI, as a deeply rooted local solution provider, has launched the OXY-TOUCH series, which integrates triple detection of gaseous oxygen, dissolved oxygen, and pressure. Publicly available information indicates that the company participated in drafting the group standard T/CITS 625-2025 Fluorescence-Based Residual Oxygen Analyzers. Its equipment meets GMP data traceability requirements while providing localized validation services. On the international front, Germany’s PreSens is the benchmark in this field. Its optical sensor-based fluorescence quenching technology boasts high sensitivity, enabling precise measurement with a minimum headspace of just 0.1 ml. It also supports non-invasive retained sample management, making it highly favored by multinational pharmaceutical companies and high-end biopharmaceutical R&D. Additionally, for small and medium-sized enterprises and food factories with limited budgets but a pursuit of compliance, the CheckPoint series under MOCON (now part of the AMETEK Group) has secured an important ecological niche in daily production line inspections and offline sampling scenarios due to its portability and durability.
II. Vacuum Decay Leak Detectors: The "Universal Cornerstone" in the CCIT System
If residual oxygen analysis is the "medical report" for product stability, then the vacuum decay leak detector is the "gatekeeper" of packaging integrity. As a deterministic testing method explicitly recommended by USP <1207>, the vacuum decay method uses high-precision sensors to capture minute pressure drops within the test chamber. It can accurately identify micron-level leakage defects, and the tested samples can be directly used for subsequent stability studies.
In terms of technology and brands, domestic manufacturers have continuously achieved breakthroughs in core technologies. Shanghai QIYI’s independently developed DHS 640 and DHS 740 vacuum decay leak detectors are particularly outstanding. The DHS 640 utilizes dual-sensor, dual-loop differential pressure detection technology and can automatically calculate leak hole sizes. While meeting the requirements of USP <1207> and relevant domestic technical guidelines, it has been successfully exported to international markets, including the United States, earning positive word-of-mouth validation from overseas users. The DHS 740 further expands to dual modes of vacuum/pressure decay, widely adapting to various dosage forms such as lyophilized powder injections and solutions. Both models are equipped with compliant software supporting audit trails and raw data export, providing solid data support for GMP certification. On the international side, the US-based PTI has long dominated the high-end market. Its Veripac series, with patented flexible sealing membranes and high-frequency sampling technology, enjoys a high reputation in seal validation for biopharmaceutical products.
III. High Voltage Leak Detection (HVLD): The "Dedicated Testing Solution" for Liquid Packaging
For sterile packaging containing conductive liquids, HVLD demonstrates distinct testing advantages. This technology applies a high-voltage electric field outside the container, utilizing changes in the current path caused by leakage points to identify defects. With a detection sensitivity of up to 0.5 μm and no need for vacuuming, it is particularly suitable for high-speed, 100% inline inspection, completely eliminating sampling risks.
Shanghai QIYI’s SPAX series is a representative domestic solution in this field. Its inline equipment can be seamlessly integrated into filling lines to achieve 100% full inspection with zero sampling risk, while also featuring audit trail capabilities. Sanquan Zhongshi’s Leak-HV has also performed excellently, demonstrating stable detection capabilities for artificially created micro-hole defects in actual tests on BFS plastic ampoules and vials. In the international market, brands such as ATC from the US have accumulated profound expertise in high sensitivity and adaptability to complex working conditions, providing a technical safety net for stringent sterility assurance.
Building a Dual-Dimensional Quality Control Loop of "Gas + Seal"
For the CCIT testing process, companies can utilize fluorescence-based residual oxygen analyzers during the R&D phase to optimize nitrogen replacement processes and evaluate packaging material barrier properties. During the production phase, HVLD leak detectors serve as an online "radar" to remove leaking products in real time, preventing microbial intrusion. In the QC release and stability study phases, vacuum decay and fluorescence-based residual oxygen analyzers form a dual-verification closed loop, helping to safeguard the quality and safety of every batch of products.
Conclusion
Faced with a dazzling array of brands and technologies, the core logic of selection should return to scenario-based product requirements. Note: The parameters in this article are sourced from public industry information, media reports, and trade show disclosures, and are for reference only. Regardless of the brand chosen, it is imperative to ensure that the equipment offers comprehensive method validation support (IQ/OQ/PQ), data integrity (audit trails, access management), and localized service capabilities. After all, in the world of CCIT, instruments are merely tools; a quality system established based on scientific risk assessment is the comprehensive solution for ensuring product quality and safety.