Ningyin V4 Portable Filter Integrity Tester

Overview

The Ningyin V4 Portable Filter Integrity Tester is an engineered solution for rapid, reliable, and regulatory-compliant integrity verification of hydrophobic and hydrophilic membrane filters used across sterile drug manufacturing, bioprocessing, and aseptic filling operations. Unlike traditional bubble point testers relying on organic wetting agents—posing solvent residue, operator safety, and environmental hazards—the V4 implements the water intrusion method as its primary hydrophobic filter evaluation mode, fully aligning with current ICH Q5A(R2), USP , and ISO 13408-2 guidance that endorse aqueous-based integrity testing for non-wettable membranes. The instrument operates on the principle of controlled gas pressure ramping while measuring volumetric gas flow (diffusion) or liquid displacement (water intrusion), enabling quantitative assessment of pore structure integrity without chemical intervention. Its portable architecture—weighing only 7.5 kg and integrating dual-height ergonomic housing—supports both inline pre-use/post-sterilization testing at filtration skids and offline benchtop validation in QC labs compliant with ISO Class B environments.

Key Features

• Automated pneumatic control system with real-time pressure ramping and adaptive flow regulation ensures consistent gas delivery, minimizing mechanical stress on fragile filter media and extending service life.
• On-device net volume calibration eliminates reliance on theoretical chamber volumes, delivering measurement traceability to ±4% accuracy for diffusion and water intrusion quantification.
• Integrated 5.7″ monochrome TFT LCD with adjustable backlight enables clear parameter visualization under variable lighting conditions typical in cleanroom corridors and isolator pass-throughs.
• Dual-mode pressure actuation—precision-controlled for low-flow diffusion tests and robustly scaled for high-pressure water intrusion—maintains stability across the full 100–8000 mbar operating range.
• Built-in thermal printer provides immediate hardcopy output of test reports including date/time stamp, operator ID, filter ID, test type, measured values, pass/fail status, and system diagnostics—critical for GLP/GMP documentation workflows.
• RS232 serial interface enables bidirectional communication with LIMS or MES platforms for automated data archival and electronic signature integration under FDA 21 CFR Part 11 configurations.

Sample Compatibility & Compliance

The V4 accommodates a comprehensive range of pharmaceutical-grade filtration formats: disc membranes (Φ25–300 mm), syringe filters, capsule filters, flat-sheet modules, and cylindrical cartridges up to 40 inches in length and 15 elements per housing. It supports symmetric and asymmetric polyethersulfone (PES), polyvinylidene fluoride (PVDF), polytetrafluoroethylene (PTFE), and nylon membranes. All test protocols conform to internationally recognized standards—including ASTM F838-22 (bacterial retention), ISO 13408-2 (sterile filtration), and USP (integrity test selection)—and are validated for use in facilities adhering to EU GMP Annex 1, PIC/S PI 036, and WHO TRS 986 requirements. The water intrusion method satisfies regulatory expectations for eliminating organic solvent handling in Grade A/B environments, reducing cross-contamination risk during filter qualification.

Software & Data Management

While the V4 operates as a standalone unit with embedded firmware, its RS232 interface facilitates seamless integration into enterprise-level quality systems. Test records—including raw pressure/flow curves, calculated bubble points, diffusion rates, and water intrusion volumes—are stored locally in non-volatile memory (500-entry capacity) with time/date stamps and user authentication fields. When connected to validated PC-based software (optional), the device supports electronic audit trails, role-based access control, and PDF report generation compliant with 21 CFR Part 11 Annex 11 requirements. All data exports include metadata required for regulatory submissions: instrument ID, calibration status, environmental monitoring logs (if interfaced), and test-specific parameters such as upstream/downstream temperature and humidity.

Applications

• Pre-sterilization integrity verification of vent filters in bioreactor and buffer tank systems.
• Post-sterilization integrity confirmation of sterilizing-grade process filters prior to product contact.
• Validation support for filter changeout programs in continuous manufacturing lines.
• Routine release testing of disposable fluid path assemblies in single-use bioprocessing.
• Investigation of filter performance drift during extended operation or after exposure to challenging process streams (e.g., high-protein loadings, viscous formulations).
• Training and troubleshooting in QA/QC laboratories due to intuitive menu navigation and real-time graphical feedback during test execution.

FAQ

Does the V4 meet FDA 21 CFR Part 11 requirements for electronic records?
Yes—when used with validated PC software and appropriate administrative controls (e.g., electronic signatures, audit trail configuration, and access restrictions), the V4 supports compliant data capture and retention.
Can the instrument perform both diffusion flow and water intrusion tests on the same filter housing?
Yes—dual-method capability allows sequential or comparative testing without hardware reconfiguration, supporting root-cause analysis when bubble point results are inconclusive.
Is calibration traceable to national standards?
All pressure transducers are factory-calibrated against NIST-traceable references; users receive a certificate of calibration valid for 12 months.
What maintenance is required for long-term reliability?
Annual verification of pneumatic seals, filter dryer replacement, and firmware updates via USB are recommended; no consumables beyond standard compressed air supply and deionized water are needed.
How does the V4 handle temperature and humidity variations during testing?
Internal environmental sensors monitor ambient conditions in real time and apply compensatory algorithms to diffusion flow calculations per ISO 13408-2 Annex C guidelines.