ZK Electronics HGT-01H Portable Residual Oxygen & Carbon Dioxide Analyzer for Modified Atmosphere Packaging

Overview

The ZK Electronics HGT-01H is a handheld, field-deployable residual gas analyzer engineered for precise quantification of oxygen (O₂) and optionally carbon dioxide (CO₂) concentrations in modified atmosphere packaging (MAP) environments. It operates on dual-sensor principles: electrochemical detection for O₂—offering high selectivity and stability in low-to-mid concentration ranges—and non-dispersive infrared (NDIR) absorption for CO₂, ensuring linearity and minimal cross-sensitivity across 0–100% vol. The instrument draws representative headspace gas samples via an integrated micro-vacuum pump into conditioned sensor chambers, where real-time analog voltage outputs are digitized, temperature-compensated, and converted to volumetric concentration values using factory-calibrated transfer functions. Designed for integration into packaging quality control workflows, the HGT-01H supports rapid verification of gas flush efficacy, seal integrity, and barrier performance—critical parameters in extending shelf life of fresh produce, ready-to-eat meals, and pharmaceutical blister packs.

Key Features

• Compact handheld form factor (230 × 120 × 82 mm; 0.7 kg) enabling single-hand operation in production lines, cold storage facilities, and QC laboratories
• Industrial-grade resistive touchscreen interface with intuitive icon-driven navigation and one-touch test initiation
• Auto-shutdown after 10 minutes of inactivity to conserve power and extend battery longevity in portable configurations
• One-button automatic zero/span calibration using certified reference gases—no external software or PC required
• Quick-connect sampling needle with protective sheath minimizes operator exposure and prevents accidental puncture during repeated container testing
• Integrated pressure sensor (optional) enables simultaneous vacuum level measurement in evacuated packages—supporting ISO 11607-2 leak assessment protocols
• Non-volatile memory stores up to 2000 test records with timestamp, sample ID, O₂/CO₂ values, and environmental conditions (temperature, pressure)
• Compliance-ready architecture: audit trail logging, user access levels, and electronic signature support align with FDA 21 CFR Part 11 and EU Annex 11 requirements when paired with optional PC software

Sample Compatibility & Compliance

The HGT-01H accommodates a broad range of rigid and flexible MAP containers—including polymeric pouches, PET trays, aluminum cans, glass jars, and thermoformed blisters—via standardized 1.2 mm stainless steel sampling needles. Its low-volume draw (≤8 mL for O₂; ≤15 mL for CO₂) preserves package integrity and avoids false-negative readings caused by excessive gas extraction. All internal wetted materials comply with USP Class VI biocompatibility standards. The device meets GB/T 28120–2011 (Chinese national standard for residual oxygen analyzers), and its optional GMP-compliant firmware module satisfies data integrity mandates under China’s 2020 GMP Annex 1 for sterile product packaging. When equipped with the optional underwater headspace sampler, it adheres to ASTM F2476–22 for quantitative analysis of dissolved and headspace gases in hermetically sealed food systems.

Software & Data Management

The HGT-01H interfaces seamlessly with ZK’s proprietary ZK-DataLink v3.2 software via USB 2.0 or Bluetooth 5.0 (optional). The application provides full traceability: raw sensor outputs, calibration logs, operator credentials, and change history are stored in encrypted SQLite databases compliant with ALCOA+ principles (Attributable, Legible, Contemporaneous, Original, Accurate, Complete, Consistent, Enduring, Available). Export formats include CSV, PDF reports (with embedded digital signatures), and XML for LIMS integration. Optional wireless thermal printer support enables on-site hardcopy generation meeting ISO/IEC 17025 documentation requirements.

Applications

• Verification of nitrogen/CO₂ flush efficiency in salad kits, cut fruit trays, and mushroom packaging
• Batch release testing of vacuum-sealed meat and cheese products per ISO 22000 clause 8.5.2
• In-process monitoring of gas composition shifts during accelerated shelf-life studies (ASLT)
• Root cause analysis of premature spoilage linked to O₂ ingress through film laminates or seal defects
• Pharmaceutical primary packaging validation—blister foil O₂ transmission rate (OTR) correlation studies
• Regulatory submission support for FDA GRAS dossiers requiring quantitative headspace gas profiles

FAQ

What gases can the HGT-01H measure simultaneously?
It measures O₂ as standard; CO₂ measurement requires installation of the optional NDIR sensor module—both gases can be analyzed sequentially in a single test cycle.
Is the instrument suitable for use in cold chain environments?
Yes—the operating temperature range is 5–40 °C with humidity tolerance up to 90% RH non-condensing, making it appropriate for refrigerated warehouses and chilled processing lines.
How often does the O₂ sensor require recalibration?
Under typical usage (≤5 tests/day), annual calibration with traceable 0% and 21% O₂ standards is recommended; sensor drift is monitored automatically via built-in diagnostics.
Can test data be exported directly to Excel or LIMS?
Yes—ZK-DataLink software exports fully formatted CSV files compatible with Microsoft Excel, and supports HL7 and ASTM E1384 message mapping for direct LIMS ingestion.
Does the device meet international regulatory requirements for pharmaceutical packaging?
When configured with GMP firmware, audit trail logging, and electronic signature modules, it fulfills core data integrity expectations of FDA 21 CFR Part 11, EU GMP Annex 11, and PIC/S PI 041–2.