DURAG Ambient Air Monitoring Systems

DURAG GROUP offers a comprehensive portfolio of ambient air monitoring solutions designed to ensure precise, real-time measurement of aerosols, dust particles, and gaseous pollutants. These systems play a critical role in protecting human health and the environment by enabling informed decisions based on accurate air quality data.

Purpose and Importance

Ambient air quality is a key factor in maintaining health and safety in workplaces, residential areas, and outdoor environments. Fine particles (dusts, aerosols) and gases can significantly impact air quality. DURAG’s high-tech instruments help detect and analyze these pollutants, supporting regulatory compliance, scientific research, and industrial safety.

Measurement Capabilities

DURAG systems are capable of detecting particles ranging from 0.8 nanometers to 35 micrometers, covering the full spectrum of ambient particulate matter. This includes:

• Nanoparticles
• PM10, PM2.5, PM1
• Total particle counts
• Gas concentrations

Applications

These systems are used across a wide range of sectors:

• Government-regulated environmental monitoring
• Scientific research
• Health and safety studies
• Industrial process control
• Occupational safety
• Mobile and stationary air quality assessments

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GRIMM 5410

Basic condensation particle counter

Compact CPC for nanoparticle counting with optimized detection efficiency and response time.  Different calibrations possible, e.g. for real-time monitoring of UFP in ambient air according to CEN draft standard prEN 16976:2023.

Functionality: Condensation particle counter

• Precise nanoparticle counting: n-Butanol based CPC, D50 = 4.0 nm, Droplet size control, Single count mode (100,000 particles/cm³) and  Photometric mode (up to 10⁷ particles/cm³)
• Sample flow rate controlled by critical orifice: External vacuum required
• Saturator shutter
• Continuous condensate drain with micro pump
• Analog input for optional meteorological sensors
• Wide range power supply: 90 … 264 VAC, 47 … 63 Hz; 80 … 130 W

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GRIMM 5705

Faraday cup aerosol electrometer

This high-end nanoparticle detector matches all experimental needs and can be operated stand-alone with the DMA and FCE controller 5706 at aerosol inlet flow rates of 1 – 5 l/min.

Functionality: Faraday cup electrometer

• Sensitivity: 0.1 fA at 1 Hz
• Low noise level of 0.35 fA
• Data sampling rate up to 16 Hz
• Sample flow rate: 1 … 5 l/min

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GRIMM 5416

High-end condensation particle counter

Precise nanoparticle counting instrument with the option to operate as a fully-equipped SMPS system.

Functionality: Condensation particle counter

• Precise nanoparticle counting: n-Butanol based CPC, D50 = 4.0 nm, Droplet size control, Single count mode (150,000 particles/cm³) and  Photometric mode (up to 10⁷ particles/cm³)
• Internal pumps for sample and sheath air
• SMPS+C capability: Integrated DMA controller, 3.0 l/min sheath air flow, 0.3 l/min sample air flow
• Saturator shutter
• Analog input for optional meteorological sensors
• Wide range power supply: 90 … 264 VAC, 47 … 63 Hz, 80 … 130 W

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GRIMM 5430 | 5431

PMP compliant condensation particle counters

High-accuracy stationary nanoparticle counters for automotive emission measurements compliant with Euro 5 and 6 standard.

Functionality: Condensation Particle Counter

• Precise nanoparticle counting: n-Butanol based CPC, Single count mode (up to 50,000 particles/cm³), Coincidence correction: < 10% up to 23,000 particles/cm³, Linearity: R² ≥ 0.98 for 1 … 23,000 particles/cm³, Counting efficiency within 50 ±12% at 23 nm and ≥ 90% at 41 nm
• Sample flow rate controlled by critical orifice: External vacuum required;
• For 5431: Sample flow rate controlled by critical orifice: Integrated sample air pump, no external vacuum required

• Saturator shutter
• Continuous condensate drain with micro pump
• Wide range power supply: 90 … 264 VAC, 47 … 63 Hz, 80 … 130 W
• Complies to the GPRE particle measurement program (PMP) for Euro 5 and 6, regulation 83

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