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Product Details
Product Introduction
The HM-DK2 is a handheld headspace gas analyzer from HM Instruments, engineered for simultaneous measurement of oxygen (O2) and carbon dioxide (CO2) concentrations inside sealed food and pharmaceutical packaging. Unlike single-gas instruments, the HM-DK2 dual gas headspace analyzer delivers both readings in one sampling cycle, which is essential for Modified Atmosphere Packaging (MAP) verification where the protective gas mixture must be confirmed before product release.
The electrochemical O2 sensor covers 0–100% with 0.01% resolution and ≤±0.2% accuracy, responding within 15 seconds. The infrared absorption CO2 sensor spans the same range at 0.01% resolution with ±(0.03%+5% of indicated value) accuracy and a response time under 20 seconds. A built-in pump draws the sample — less than 5 ml for O2 and less than 15 ml for CO2 — so package integrity is preserved. Two-point calibration against the JJG 365-2008 reference standard keeps measurements traceable. Weighing just 450 g with a 3000 mAh lithium battery rated for eight hours of continuous use, the HM-DK2 is designed for production-line and warehouse testing where portability matters.
Applications
- Packaging bags — coffee, cheese, milk tea, milk powder, bread, MAP trays, instant food, medicine
- Packaging containers — canned coffee, canned milk powder, canned food, Tetra Pak cartons, beverages
- Extended applications — ampoule top gas O2 testing for injectable pharmaceuticals
Features
- Handheld design for single-hand operation in production environments.
- Automatic shutdown to conserve battery when idle.
- Quick-insertion needle protective sleeve for safe and repeatable sampling.
- Built-in dual gas sensors — electrochemical O2 and infrared CO2 — as standard.
- Built-in pressure sensor for package headspace pressure compensation.
- Imported brand sensors for long-term stability and accuracy.
- One-button operation, one-button calibration, and remote firmware upgrade.
- Chinese-English one-click language switch for bilingual operators.
- Automatic data storage with power-off memory retention for 2000 sets.
- USB interface for direct data export to PC.
- 3000 mAh rechargeable lithium battery delivering up to 8 hours of continuous testing.
- Optional Bluetooth printer for on-site report generation.
Technical Parameters
| Item | Specification |
|---|---|
| O2 sensor type | Electrochemical |
| O2 measurement range | 0–100% |
| O2 resolution | 0.01% |
| O2 accuracy | ≤±0.2% |
| O2 response time | ≤15 s |
| O2 sampling volume | <5 ml |
| O2 sensor lifespan | ~2 years |
| CO2 sensor type | Infrared absorption |
| CO2 measurement range | 0–100% |
| CO2 resolution | 0.01% |
| CO2 accuracy | ±(0.03%+5% of indicated value) |
| CO2 response time | ≤20 s |
| CO2 sampling volume | <15 ml |
| CO2 sensor lifespan | >15 years |
| Sampling method | Built-in pump suction |
| Calibration intake pressure | 700–1500 mbar (abs.) |
| Calibration method | Two-point calibration |
| Data storage | 2000 sets circular storage |
| Data transmission | USB interface |
| Battery | 3000 mAh lithium battery |
| Working temperature | 0–40 °C |
| Operation language | Chinese-English one-click switch |
| Size | 180 × 106 × 80 mm |
| Weight | 450 g |
| Reference standard | JJG 365-2008 |
Expert Review
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