Air Particulate Sampler for Occupational Health Monitoring

Product Introduction

Occupational health professionals, industrial hygienists, and environmental compliance officers face a critical challenge in workplace air quality monitoring: temperature fluctuations during extended sampling periods can significantly alter absorption efficiency in gaseous pollutant sampling, leading to underestimated or overestimated exposure concentrations. Traditional ambient air samplers without temperature control allow the absorption solution temperature to drift with ambient conditions, introducing measurement uncertainty that directly affects compliance decisions and worker health protection.

The HM-H2 constant temperature and constant flow air particulate sampler from HM Instruments directly addresses this problem. By integrating a thermostatic gaseous sampling channel with a particulate collection channel in one instrument, it maintains stable absorption solution temperature throughout the entire sampling period — from one minute to 99 hours 59 minutes — ensuring that SO2, NOx, and other gaseous pollutant concentrations reflect true workplace exposure levels rather than artifacts of temperature variation.

The particulate sampling channel delivers flow from 10 to 130 L/min with accuracy better than ±2.0%, supporting TSP, PM10, and PM2.5 collection with appropriate cutting heads — essential for respirable dust assessment in mining, construction, and manufacturing environments. Flow stability better than ±2.0% across both channels guarantees consistent volumetric accuracy for defensible exposure data. The instrument automatically measures pre-gauge temperature and pressure, computing standard condition sampling volume without manual correction — reducing operator error and improving data quality for regulatory submissions.

Operating noise below 60 dB(A) allows deployment in occupied workspaces without disrupting normal operations. The dual power supply — AC220V ±10% 50Hz for fixed-site monitoring or DC29.4V/5A for field surveys — provides flexibility across monitoring scenarios. At approximately 4.0 kg with dimensions of 165 × 330 × 275 mm, the HM-H2 is easily transported between monitoring locations. Power consumption below 100W supports energy-efficient continuous operation. Fully compliant with HJ/T 376-2007 for 24-hour constant temperature automatic continuous ambient air sampling, the HM-H2 at $814 delivers professional-grade thermostatic sampling capability for occupational health and public health monitoring applications.

Applications

• Occupational health exposure assessment. Measure SO2, NOx, and particulate matter concentrations in factory floors, chemical plants, and mining operations to verify compliance with workplace exposure limits.
• Industrial hygiene monitoring. Conduct 24-hour continuous air sampling in production workshops to characterize chronic exposure profiles for worker health protection programs.
• Construction site dust monitoring. Collect PM10 and PM2.5 samples at construction perimeters to assess respirable dust impact on nearby workers and communities.
• Public health surveillance. Monitor ambient air quality near schools, hospitals, and residential areas where vulnerable populations require reliable exposure data.
• Environmental impact assessment. Establish baseline air quality conditions at proposed industrial sites and verify post-construction compliance with environmental permits.
• Laboratory animal facility monitoring. Sample gaseous ammonia and particulate contaminants in animal housing to ensure welfare compliance and personnel safety.
• Chemical spill emergency response. Deploy rapid air sampling to characterize airborne contaminant concentrations during and after chemical release incidents.
• Urban air quality network stations. Integrate thermostatic sampling capability into municipal air quality monitoring networks for data consistency across stations.

Key Features and Advantages

1. Constant temperature gaseous sampling. Thermostatic control of absorption solution temperature eliminates temperature-induced sampling errors — the core advantage that distinguishes the HM-H2 from non-thermostatic models for reliable exposure assessment.
2. Constant flow stability better than ±2.0%. Consistent flow rate across both gaseous and particulate channels ensures accurate volumetric measurement for defensible regulatory data.
3. Integrated dual-channel design. Simultaneous gaseous and particulate sampling in one instrument reduces equipment cost and field setup time compared to operating separate samplers.
4. Particulate sampling 10 to 130 L/min. Wide flow range with accuracy better than ±2.0% supports TSP, PM10, and PM2.5 collection with appropriate cutting heads for comprehensive dust characterization.
5. Automatic standard condition volume calculation. Onboard pre-gauge temperature and pressure measurement with automatic compensation eliminates manual correction errors in exposure data.
6. Pre-gauge pressure -35 to 35 kPa. Wide pressure measurement range supports reliable operation across varying filter loading conditions during extended sampling runs.
7. Atmospheric pressure 50 to 110 kPa. Full-range barometric compensation ensures volumetric accuracy at different altitudes — critical for mining and mountainous monitoring sites.
8. Sampling time 1 min to 99 h 59 min. Timing accuracy better than ±0.2% supports both short-term grab sampling and 24-hour continuous monitoring protocols.
9. Noise below 60 dB(A). Quiet operation enables deployment in occupied offices, hospitals, and schools without disrupting normal activities.
10. Dual power supply. AC220V ±10% 50Hz for fixed-station continuous monitoring and DC29.4V/5A for battery-powered field surveys — one instrument for all deployment scenarios.
11. Power consumption below 100W. Energy-efficient continuous operation reduces operating costs for 24-hour monitoring programs.
12. Compact and portable. 165 × 330 × 275 mm at approximately 4.0 kg for easy transport between monitoring locations in multi-site compliance programs.
13. HJ/T 376-2007 compliance. Fully certified for 24-hour constant temperature automatic continuous ambient air sampling — accepted by regulatory authorities for compliance reporting.
14. Power failure data protection. Automatic data saving and sampling resume after power restoration prevents data loss during unexpected outages in field deployments.

Technical Specifications

FAQ

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