HAIDA HD-D021 Air Permeability Tester

Overview

The HAIDA HD-D021 Air Permeability Tester is a precision-engineered instrument designed for the quantitative determination of air permeability in porous and semi-porous planar materials. It operates on the principle of measuring volumetric airflow rate under a controlled, standardized pressure differential across a defined test area—consistent with the fundamental methodology of ISO 9237 and ASTM D737. The system employs a calibrated orifice-based flow measurement architecture, where airflow is induced by a low-noise, variable-speed suction fan, and differential pressure is monitored in real time using a high-accuracy imported micro-differential pressure transducer. This configuration ensures traceable, repeatable results across a broad range of industrial textiles and engineered sheet materials—including woven and knitted fabrics, nonwovens, coated substrates, filtration media, technical leathers, polymer films, and industrial papers. Its dual-mode operation (rapid mode and stabilized pressure mode) enables both high-throughput screening and high-fidelity characterization, particularly for low-permeability specimens requiring extended dwell-time pressure stabilization.

Key Features

• High-precision micro-differential pressure sensor with <0.5% full-scale accuracy, enabling reliable quantification of low airflow rates down to 1 mm/s (under 200 Pa)
• 7-inch color TFT touchscreen interface with intuitive menu-driven navigation supporting both English and Chinese language options
• Proprietary acoustic-dampened suction system featuring custom-designed muffling chambers and variable-frequency fan control—reducing operational noise to ≤62 dB(A) at 1 m distance
• Integrated calibration port with NIST-traceable standard orifice plate for on-site verification and periodic recalibration without external tools
• Dual-test protocol selection: Rapid Mode (single-point measurement completed in <30 s at 100 Pa or 200 Pa) and Stabilized Mode (ramp-and-hold pressure profile with user-defined dwell time up to 120 s)
• Robust mechanical design with stainless-steel test head, pneumatic sample clamping, and ISO-compliant 20 cm² test area aperture

Sample Compatibility & Compliance

The HD-D021 accommodates flat, flexible sheet materials up to 5 mm thickness and minimum dimensions of 150 × 150 mm. Specimen clamping ensures uniform sealing without edge leakage, critical for maintaining laminar flow conditions during measurement. The instrument fully complies with international test standards governing air permeability assessment, including ISO 9237 (Textiles — Determination of permeability of fabrics), ASTM D737–22 (Standard Test Method for Air Permeability of Textile Fabrics), EN ISO 7231 (Determination of air permeability of fabrics), GB/T 5453 (Chinese national standard for textile air permeability), GB/T 13764 (Permeability testing of geotextiles), JIS L 1096, BS 5636, DIN 53887, AFNOR G07-111, EDANA 140.1 (for nonwovens), and TAPPI T 251. All compliance-related test parameters—including specified pressure differentials (e.g., 100 Pa, 200 Pa), conditioning requirements (20°C ±2°C / 65% RH ±4%), and reporting units (mm/s, L/m²·s, or cm³/cm²·s)—are preconfigured in the firmware and enforceable via audit-trail-enabled test logs.

Software & Data Management

The embedded firmware supports GLP-compliant data handling with timestamped test records, operator ID assignment, and automatic generation of PDF/CSV reports. Each test entry includes raw pressure vs. time curves, calculated airflow rate, coefficient of variation (CV%), and pass/fail status against user-defined specification limits. Data export is enabled via USB 2.0 port; no cloud dependency or proprietary software installation is required. For regulated environments, optional firmware upgrade supports 21 CFR Part 11-compliant electronic signatures, audit trail logging (with immutable timestamps and change history), and role-based access control (Administrator, Technician, Viewer). All calibration events—including date, reference standard ID, and deviation values—are archived separately and linked to subsequent test records.

Applications

• Quality assurance in textile manufacturing: monitoring weave density, finishing efficiency, and coating integrity across production batches
• R&D of breathable medical barrier fabrics and surgical gowns per ISO 22609 and AAMI PB70
• Performance validation of HVAC filter media, battery separator films, and fuel cell gas diffusion layers
• Regulatory testing of geotextiles and civil engineering membranes per EN ISO 11058 and ASTM D4491
• Material selection support for packaging films requiring controlled oxygen transmission (OTR) correlation studies
• Failure analysis of laminated composites and coated papers exhibiting inconsistent breathability or delamination-induced channeling

FAQ

What pressure differentials can the HD-D021 apply during testing?

The instrument supports user-selectable test pressures of 100 Pa, 200 Pa, and custom values between 10–500 Pa, with closed-loop pressure regulation accuracy of ±1.5 Pa.
Is the test area fixed or adjustable?

The standard test aperture is fixed at 20 cm² (50 mm diameter), conforming to ISO 9237 and ASTM D737. Optional adapters for 5 cm² and 100 cm² test areas are available upon request.
How often does the system require calibration verification?

Daily verification using the supplied standard orifice plate is recommended before first use and after any maintenance event; full calibration traceable to national metrology institutes is advised every 12 months.
Can the HD-D021 interface with laboratory information management systems (LIMS)?

Yes—via configurable ASCII text output over RS-232 or USB CDC virtual COM port, supporting automated ingestion into third-party LIMS or MES platforms.
Does the instrument meet requirements for ISO/IEC 17025-accredited testing laboratories?

When operated with documented procedures, trained personnel, and verified calibration records, the HD-D021 satisfies the technical competence criteria outlined in ISO/IEC 17025:2017 Clause 6.4 (Equipment) and Clause 7.7 (Ensuring validity of results).