GBPI GB-DP – Face Mask Differential Pressure Tester (Delta P Breathability)
- Precision laboratory face mask differential pressure tester for breathability and airflow resistance characterization
- Full testing compliance with EN 14683:2019 (Annex C ΔP), ASTM F2100, YY 0469, and YY/T 0969
- Delivers standardized airflow of 8 L/min across circular specimen test area of Φ25 mm (4.9 cm2)
- Ultra-sensitive electronic differential pressure transducer with range of 0 ~ 500 Pa (0.1 Pa resolution)
- Automatic calculation and instant reporting of Delta P breathability index in Pa/cm2
- Quick-action pneumatic specimen clamping ensuring zero peripheral air bypass leakage
- Color touchscreen interface with automated test sequencing and integrated thermal result printer
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The GBPI GB-DP is an industry-standard benchtop face mask differential pressure tester engineered to determine the airflow resistance, breathability index (Delta P / ΔP), and gaseous exchange permeability of medical face masks, surgical drapes, respiratory protective covers, and non-woven filter fabrics. Built in rigorous compliance with EN 14683:2019 Annex C (method for determination of breathability — differential pressure) and ASTM F2100, this instrument provides mask manufacturers with essential data to achieve Type I, Type II, and Type IIR medical device conformity.
While multi-layer surgical masks must provide high bacterial and particulate filtration retention, excessive air resistance can severely impair wearer comfort, leading to respiratory fatigue and dangerous edge bypass leakage around the facial perimeter during prolonged clinical shifts. The Delta P differential pressure parameter directly measures the pressure difference per square centimeter required to draw a standardized column of air through the mask fabric. Operating as an automated face mask differential pressure tester, the GBPI GB-DP pulls or forces air through an isolated circular 25 mm diameter sample zone (4.9 cm² surface area) at a tightly regulated volumetric flow rate of 8.0 L/min, measuring the static pressure difference between upstream and downstream ports.
High-Precision Electronic Differential Pressure Transducer
The instrument features an ultra-sensitive micro-differential pressure sensor spanning 0 to 500 Pa with a resolution of 0.1 Pa and accuracy within ±1%. Once airflow stabilizes, the internal digital processor automatically divides the differential pressure reading by the effective test area (4.9 cm²), displaying the final breathability score in Pa/cm² in accordance with EN 14683 thresholds (<40 Pa/cm² for Type I/II and <60 Pa/cm² for Type IIR).
Pneumatic Clamping & Rapid Calibration
To eliminate manual clamp variability and bypass air loss, an integrated pneumatic clamping assembly secures mask specimens with uniform perimeter sealing force. The instrument incorporates precision mass flow controllers that maintain flow stability despite fluctuating upstream compressed air pressure.
Featuring an intuitive color touchscreen, automatic zero-point calibration, and built-in micro-printer, the GB-DP streamlines high-throughput quality control across protective apparel manufacturing lines.
GBPI GB-DP Face Mask Differential Pressure Tester – Technical Specifications
| Technical Parameter | Specification Details |
|---|---|
| Test Principle | Constant Airflow Differential Pressure Decay (Delta P Breathability Method) |
| Applicable Standards | EN 14683:2019 (Annex C), ASTM F2100, YY 0469, YY/T 0969 |
| Standard Test Airflow | 8.0 L/min ±0.2 L/min (Adjustable range: 1.0 ~ 10.0 L/min via mass flow controller) |
| Effective Sample Test Area | Circular Φ25 mm (Φ25 mm orifice; 4.9 cm² effective exposure area) |
| Differential Pressure Range | 0 ~ 500 Pa (Resolution: 0.1 Pa; Accuracy: ±1% of reading) |
| Calculated Breathability Units | Pa/cm² (Calculated automatically as ΔP / 4.9 cm²) and mm H2O/cm² |
| Specimen Clamping Mechanism | Pneumatic automatic cylinder clamping with airtight silicone sealing gasket |
| Air Source Requirement | Clean compressed air, 0.4 ~ 0.8 MPa (Standard Φ6 mm polyurethane tube port) |
| User Interface & Control | Integrated 7-inch color LCD touchscreen terminal with automatic curve plotting |
| Overall Dimensions | 460 mm (L) × 400 mm (W) × 560 mm (H) |
| Instrument Net Weight | Approximately 28 kg |
| Power Supply & Rating | AC 220 V ±10%, 50 Hz / 60 Hz; Total Power: 100 W |
Key Features & Engineering Highlights
- Full Compliance with EN 14683 Annex C: Pre-programmed with standard 8 L/min flow and 4.9 cm² area parameters for instant Delta P compliance verification.
- High-Resolution Differential Sensor: Measures subtle pressure variations down to 0.1 Pa with superior thermal zero-drift stability.
- Automated Pa/cm² Calculation: Directly converts raw millibar/Pascal readings into standardized breathability indices without manual math.
- Pneumatic Sample Clamping: Guarantees uniform peripheral clamping pressure, eliminating air bypass and specimen wrinkling errors.
- Digital Mass Flow Regulation: Precision mass flow controller maintains consistent 8 L/min velocity irrespective of fluctuating supply pressure.
- Integrated Color Touchscreen: Simplifies operator training with single-button test execution and immediate pass/fail threshold indication.
- On-Board Thermal Printer: Prints instantaneous quality control slips with date, specimen number, differential pressure, and Delta P values.
Standard Package & Accessories
| Item Description | Quantity |
|---|---|
| GBPI GB-DP Face Mask Differential Pressure Tester Mainframe | 1 Unit |
| Standard Circular Specimen Test Fixture (Φ25 mm Orifice, 4.9 cm²) | 1 Set |
| High-Precision Electronic Mass Flow Controller Assembly | 1 Set |
| Pneumatic Gas Connection Tube (Φ6 mm) & Quick-Coupling Connectors | 1 Set |
| Integrated Micro Thermal Printer & Paper Roll | 1 Set |
| Power Supply Cable, Operating Manual & Calibration Certificate | 1 Set |
Target Industry Applications
Medical Face Masks (EN 14683)
Classifying medical masks into Type I (<40 Pa/cm²), Type II (<40 Pa/cm²), and Type IIR (<60 Pa/cm²) breathability grades.
Surgical Drapes & Gowns
Evaluating air exchange properties of non-woven surgical gowns and sterile protective apparel under clinical standards.
Meltblown & Composite Media
Monitoring pressure drop across raw meltblown fabric batches to optimize fiber diameter, basis weight, and fiber orientation.
Inspection Agencies & Metrology
Standard regulatory testing device for hospital purchasing compliance, PPE certification bodies, and customs inspection.