Junray ZR-1211 Respiratory Resistance Tester for Face Masks

Overview

The Junray ZR-1211 Respiratory Resistance Tester is a precision-engineered instrument designed to quantify the pressure differential across face mask materials under controlled airflow conditions—specifically measuring inspiratory and expiratory resistance in accordance with internationally recognized respiratory protective equipment standards. It operates on the principle of regulated constant-flow pneumatic testing: air is drawn or pushed through a mounted mask sample at user-selectable, stabilized volumetric flow rates, while high-accuracy differential pressure transducers capture the resulting ΔP (in Pa) across the specimen. This measurement directly reflects the breathing effort required by the wearer and serves as a critical performance indicator for filtration efficiency, comfort, and regulatory conformance. The system is purpose-built for quality control laboratories, national PPE testing institutions, and medical device manufacturers engaged in validation and batch release testing of surgical masks, KN95/N95-equivalent respirators, children’s masks, and reusable fabric face coverings.

Key Features

• Compliant anthropomorphic headform per Annex B of GB 2626–2019; optional headform configurations available for adult, pediatric, and anatomically differentiated testing.
• 7-inch high-resolution capacitive touchscreen interface with intuitive menu navigation and real-time graphical display of flow rate, pressure drop, and pass/fail status.
• Integrated mass flow controller with electronic thermal anemometry, achieving ±1.5% full-scale accuracy across all supported flow points.
• Automated constant-flow regulation at seven standardized test points: 30, 40, 45, 85, 90, 95, and 160 L/min—covering the full spectrum from low-flow pediatric use to high-flow occupational demand scenarios.
• Independent inspiratory and expiratory test modes, each with dedicated flow direction control, pressure sensor calibration, and dynamic zero compensation to eliminate hysteresis effects.
• Onboard non-volatile memory supporting ≥10,000 test records with timestamp, operator ID, mask lot number, flow setting, measured ΔP, and automated PASS/FAIL classification based on user-defined thresholds aligned with GB, EN, or ASTM limits.
• Integrated thermal printer and USB 2.0 host port for direct export of CSV-formatted datasets or PDF reports—compatible with laboratory information management systems (LIMS) and internal audit documentation workflows.
• Self-diagnostic firmware with real-time monitoring of sensor drift, flow path obstruction, seal integrity, and pressure transducer stability; initiates safe shutdown upon detection of out-of-tolerance conditions.

Sample Compatibility & Compliance

The ZR-1211 accommodates flat-panel mask samples (including multi-layer nonwovens, melt-blown filters, and laminated composites), as well as fully assembled, headform-mounted respirators—including cup-style, fold-flat, and contoured designs. Its mechanical fixture ensures reproducible clamping force and leak-free sealing around the perimeter per ISO 16900-2 guidance. Regulatory alignment includes mandatory clauses from GB 2626–2019 (Clause 6.3, “Resistance to Inhalation and Exhalation”), GB/T 38880–2020 (Section 5.4, “Breathing Resistance”), GB 19083–2010 (Section 4.3), and GB/T 32610–2016 (Clause 6.4). For international equivalence, it supports test protocols referenced in DIN EN 149:2001 (Annex A, “Determination of breathing resistance”) and ASTM F2100–2111 (Section 7.3, “Differential Pressure Testing”). All calibrations are traceable to NIM (National Institute of Metrology, China) standards, and the instrument meets GLP-compliant data integrity requirements—including audit-trail-enabled user login, parameter change logging, and immutable record timestamps.

Software & Data Management

The embedded firmware implements role-based access control (RBAC) with three-tier user profiles: Operator, Supervisor, and Administrator. Test parameters, pass/fail criteria, and report templates are configurable via password-protected menus. Raw data—including time-stamped pressure vs. flow curves—is stored in binary format with CRC-32 checksum validation. Exported CSV files include metadata fields compliant with ISO/IEC 17025 documentation requirements: test date/time, environmental temperature/humidity (optional external sensor input), operator ID, instrument serial number, calibration due date, and uncertainty budget references. The system supports FDA 21 CFR Part 11–compliant electronic signatures when integrated with validated third-party LIMS platforms via RS-232 or Ethernet TCP/IP.

Applications

• Final product verification for disposable medical/surgical masks prior to sterilization and packaging.
• Raw material screening of melt-blown polypropylene media, electrostatically charged nonwovens, and hydrophobic barrier layers.
• Comparative evaluation of breathability-performance trade-offs during R&D of reusable textile masks with wash-cycle durability testing.
• Regulatory submission support for CE marking (under PPE Regulation EU 2016/425), NIOSH N95 certification pre-screening, and China NMPA registration dossiers.
• Periodic in-house QC audits and annual metrological verification in accordance with JJF 1033–2016 (Metrological Verification Regulations for Flow Measurement Instruments).

FAQ

Does the ZR-1211 support both upstream and downstream pressure measurement configurations?

Yes—the dual-port differential pressure sensor allows flexible mounting for either mask-inlet or mask-outlet reference positioning, enabling compliance with both GB and EN standard phrasing of “resistance to inhalation” (upstream) and “resistance to exhalation” (downstream).
Can test results be exported in a format compatible with statistical process control (SPC) software?

Absolutely—CSV exports include columns for individual replicate measurements, mean ΔP, standard deviation, and CPK indices when batch statistics are enabled, facilitating direct import into Minitab, JMP, or custom SPC dashboards.
Is periodic recalibration required—and what documentation accompanies calibration services?

Annual calibration is recommended per ISO/IEC 17025 guidelines; Junray provides NIM-traceable calibration certificates with measurement uncertainty budgets, as-found/as-left data, and environmental condition logs.
How does the system handle mask leakage during high-flow testing?

The firmware continuously monitors flow stability and triggers an immediate alert if deviation exceeds ±3% of setpoint for >2 seconds—indicating potential seal failure or structural collapse—then halts the test and flags the result as invalid.
Are firmware updates provided post-purchase, and how are they deployed?

Yes—free firmware updates are issued biannually via secure download portal; installation requires USB flash drive transfer and guided on-device verification with cryptographic signature check.