GBPI GBN701 Mask Differential Pressure Tester

Overview

The GBPI GBN701 Mask Differential Pressure Tester is a precision-engineered instrument designed to measure the pressure differential (ΔP) across respirator and surgical mask materials at standardized airflow rates—directly supporting compliance with ISO 13485, ASTM F2100, EN 14683, and GB 19083–2010. Unlike qualitative penetration tests, this system quantifies breathability by applying calibrated, regulated air pressure across a defined test area (28.27 cm²), enabling reproducible determination of air permeability resistance in Pa/cm² or mm H₂O/cm². The device operates on the principle of constant-pressure differential testing: compressed air is delivered at user-selectable setpoints (3, 5, 7, 14, and 20 kPa), while pressure transducers and digital timing circuits record real-time response characteristics. Its architecture eliminates dependency on external compressed air infrastructure—integrated pressure regulation ensures stable output within ±1% of setpoint across ambient temperature ranges (15–30°C) and relative humidity ≤70% RH.

Key Features

• Five pre-programmed differential pressure setpoints (3, 5, 7, 14, and 20 kPa) with analog pressure gauge verification and digital fine-tuning capability
• Self-contained air supply system delivering (20 ± 1) kPa output—no external compressor required; suitable for ISO Class 7 cleanroom environments and mobile lab deployment
• Stainless-steel test chamber with integrated clamping mechanism generating ≥13.5 N·m torque for uniform, leak-free specimen fixation
• Standardized square test area of 75 mm × 75 mm (28.27 cm² exposure surface), conforming to GB 19083–2010 and ASTM F2299 geometrical requirements
• Digital timer with ±1 s accuracy, auto-triggered upon pressure stabilization, supporting GLP-compliant test logging
• Open-area stainless-steel retainer grid (≥50% free area) engineered to withstand 20 kPa without deformation exceeding 5 mm—ensuring consistent flow profile and eliminating edge turbulence effects
• Compact footprint (W×D×H: 420 × 350 × 380 mm) and low power consumption (AC 220 V, 50 Hz, 100 W)

Sample Compatibility & Compliance

The GBN701 accommodates flat, non-stretchable mask filter media—including melt-blown polypropylene, electrostatically charged nonwovens, and multi-layer laminates—without requiring adhesive mounting or thermal pretreatment. Specimens are loaded manually into the stainless-steel test frame and secured via high-torque clamp assembly, minimizing slippage-induced measurement drift. All mechanical and pneumatic components comply with CE machinery directive 2006/42/EC and RoHS 2011/65/EU. Test methodology aligns with regulatory benchmarks: pressure calibration traceable to NIM (National Institute of Metrology, China); timing circuit certified per ISO/IEC 17025:2017 by CNAS-accredited calibration labs. Data output supports audit readiness for FDA 21 CFR Part 11 (when paired with GBPI’s optional compliant software suite), EU MDR Annex II documentation, and WHO PQS validation protocols.

Software & Data Management

While the base GBN701 operates as a stand-alone hardware platform, optional GBPI LabLink™ v3.2 software enables full traceability and reporting automation. The application captures timestamped pressure profiles, elapsed test duration, operator ID, and environmental metadata (ambient T/RH logged via optional sensor module). Export formats include CSV, PDF test certificates (with digital signature support), and XML for LIMS integration. Audit trail functionality records all parameter modifications, user logins, and result deletions—fully satisfying GLP/GMP data integrity requirements. Raw data files are write-protected post-acquisition and stored in encrypted local directories with SHA-256 hashing for version control.

Applications

• QC release testing of surgical masks per EN 14683 Type IIR and ASTM F2100 Level 3 specifications
• R&D evaluation of filtration efficiency–breathability trade-offs during new material development
• Batch-to-batch consistency verification for melt-blown web suppliers
• Regulatory submission dossiers requiring ΔP vs. filtration performance correlation (e.g., FDA 510(k), Health Canada Medical Device License)
• ISO 13485 internal audit evidence for respiratory protection product manufacturers
• Third-party certification body testing per GB/T 32610–2016 (daily protective masks) and YY/T 1497–2016 (children’s masks)

FAQ

What standards does the GBN701 directly support?
It is configured to execute test protocols specified in GB 19083–2010, ASTM F2100–23, EN 14683:2019+AC:2022, and ISO 13485:2016 Annex A.2.
Can the instrument be used for quantitative airflow rate measurement?
No—the GBN701 measures pressure drop only. For volumetric flow quantification (e.g., L/min), pairing with a calibrated laminar flow element and differential pressure sensor is required.
Is calibration certificate included with shipment?
Yes—a factory-issued calibration report (NIST-traceable pressure and time references) is provided; annual recalibration is recommended per ISO/IEC 17025 guidelines.
Does the system require compressed air from facility lines?
No—its integrated air generation module delivers stable (20 ± 1) kPa output without external infrastructure.
How is sample leakage prevented during testing?
The dual-seal stainless-steel chamber design, combined with 13.5 N·m clamping torque and silicone gasket interface, achieves <1% leakage rate at 20 kPa per ISO 5801 leakage verification protocol.