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Product Details
Product Introduction
HM-HW300B is an extended-span dual-channel portable non-dispersive infrared (NDIR) gas analyzer manufactured by HM Instruments for industrial hygiene audits, factory occupational exposure evaluations, and environmental protection enforcement. Built with two high-durability NDIR optical absorption cells, HM-HW300B simultaneously determines carbon monoxide across 0 to 200 ppm (0.1 ppm resolution) and carbon dioxide across 0 to 1.000% (0.0001% resolution). This expanded span prevents out-of-range sensor clipping in industrial factory environments, combustion test bays, and high-density occupational venues. An onboard continuous diaphragm sampling pump operates in tandem with a digital flow sensor to ensure steady, verifiable gas delivery. Built on an Android operating architecture with an intuitive 7-inch color touchscreen, the device plots simultaneous dual-channel trend lines, computes 0.5h, 8h, and daily TWA exposure averages, and supports automated conversion across ppm, mg/m³, and percentage. With integrated constant-temperature heating, dual nitrogen and catalytic zeroing, and an onboard thermal printer, HM-HW300B strictly satisfies JJG 635-2011 and GBZ/T 300.37-2017 standards. Review full engineering configurations on the HM-HW300B high-capacity dual gas analyzer datasheet.
Applications
Integrated public place hygiene supervision simultaneously assessing carbon monoxide and carbon dioxide levels.
Environmental protection and disease control centers (CDC) conducting synchronous chemical pollutant evaluations.
Occupational health exposure assessments in metallurgical, automotive manufacturing, and chemical production workshops.
Building commissioning, green architecture IAQ certification, and HVAC dynamic ventilation auditing.
Underground parking structures, tunnel traffic corridors, and enclosed logistics hub environmental surveillance.
Functional Performance
Extended dual-gas range measuring CO (0–200 ppm) and CO2 (0–1.000%) simultaneously in one unit.
Independent dual-bench NDIR optical absorption technology with superior baseline stability.
Integrated diaphragm vacuum pump with dynamic digital flow monitoring from 0.5 to 2.0 L/min.
7-inch Android color capacitive touchscreen interface displaying dual graphical curves.
Automated zero-point calibration featuring internal solenoid valve pathway switching.
Dual zeroing methodology supporting both pure nitrogen zero gas and catalytic zeroing in the field.
Internal thermostatic heating circuit guaranteeing uncompromised optical accuracy in low temperatures.
Built-in high-speed thermal printer producing immediate, court-admissible field test vouchers.
Massive onboard data memory holding over 100,000 dual-parameter measurement datasets.
Multi-interval averaging providing 0.5-hour, 8-hour TWA, and daily mean concentration calculations.
Standard Wi-Fi network connectivity (optional 4G) and direct USB drive data export.
Main Parameters
| Parameter | Specification |
|---|---|
| Detection Principle | Non-dispersive infrared (NDIR) spectrometry |
| Target Gas | Air containing Carbon Monoxide (CO) and Carbon Dioxide (CO2) |
| Measurement Range | 0~200.0×10⁻⁶ (0~200 ppm) CO; 0~1.000% (0~10000 ppm) CO2 |
| Resolution | CO: 0.1×10⁻⁶; CO2: 0.0001% |
| Linearity Error | ≤ ±2% F·S |
| Repeatability | ≤ 1.0% |
Technical Parameters
| Parameter | Specification |
|---|---|
| Product Model | HM-HW300B |
| Detection Principle | Non-dispersive infrared (NDIR) spectrometry |
| Target Gas | Air containing Carbon Monoxide (CO) and Carbon Dioxide (CO2) |
| Sampling Method | Built-in precision suction pump |
| Measurement Range | 0~200.0×10⁻⁶ (0~200 ppm) CO; 0~1.000% (0~10000 ppm) CO2 |
| Resolution | CO: 0.1×10⁻⁶; CO2: 0.0001% |
| Operating Temperature Range | CO: 0~45℃; CO2: 20℃~65℃ |
| Operating Humidity Range | 0–95% RH (non-condensing) |
| Concentration Display | Automatic unit conversion across ppm, mg/m³, and % |
| Display Screen | 7-inch capacitive color touchscreen (Android OS) |
| Data Storage Capacity | > 100,000 complete measurement datasets |
| Zero Calibration | Automated zero point calibration (Nitrogen and Catalytic zeroing) |
| Linearity Error | ≤ ±2% F·S |
| Repeatability | ≤ 1.0% |
| Span Drift | ≤ ±2% F·S / 3h |
| Zero Drift | ≤ ±1% F·S / h |
| Carbon Dioxide Removal / Interference | 1250 mg/m³ CO ≤ ±0.3% F·S |
| Response Time | CO: t90+60s ≤ 45s; CO2: ≤60 s |
| Preheating Time | 5 min |
| Sampling Flow Rate | (0.5–2.0) L/min (digital flow tracking) |
| Data Output Interface | USB direct export to flash drive; Wi-Fi platform sync |
| Printer Configuration | Integrated micro-thermal printer with QR code printing |
| Alarm Function | Audible buzzer and visual flashing alarm |
| Power Supply | Built-in rechargeable lithium battery, AC/DC dual use (110–240 V AC / internal DC) |
| Instrument Dimensions | 257.3 × 147 × 300 mm |
| Package Dimensions & Weight | 12.5 kg (External: 257.3×147×300 mm, Package: 460×265×420 mm) |
Expert Review
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