Environmental Monitoring Solutions
The system works on the single particle’s 90-degree scattered light measurement principle, considering signal duration and shape. Technology and algorithms were developed based on the EN 16450-certified Fidas® 200. With additional sensors for CO2, AQ Guard determines the data required to determine the air quality index (AQI).
The combined measurement of CO2 content and particle size distribution also allows conclusions to be drawn about air contamination by human germs and particles. In indoor areas, it is thus possible to determine what proportion of the air has been exhaled and therefore contains potentially infectious particles. This type of measurement data evaluation represents a new dimension in indoor air quality assessment and is available in AQ Guard as an “infection risk index” (patent pending).
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| Measuring principle | Optical light scattering at single particles |
| Reported data | PM1, PM2.5, PM4, PM10, TSP, CN, particle size distribution, ambient pressure, ambient temperature, rel. ambient humidity, CO2, Infection Risk Index, Air Quality Index (depending on configuration) |
| Measurement range (number CN) | 0 – 20,000 particles/cm³ |
| Measurement range (size) | 0.175 – 20 µm (with IAHP-Package installed, starting from 0.150 µm) |
| Measurement range (mass) | 0 – 20,000 µg/m³ |
| Measurement uncertainty | R² > 0.98 for PM2.5 and R² > 0.94 for PM10 versus EN 16450-certified Fidas® 200 (15 min average, each) |
| Volume flow | 1 l/min ≙ 0.06 m³/h |
| Size channels | 64 (32/decade) |
| Interfaces | USB, Ethernet (LAN), Wi-Fi, 4G (optional via LTE stick) |
| User interface | Touchscreen, 800 × 480 pixel, 5″ (12.7 cm) |
| Protocols | UDP, ASCII |
| Data logger storage | 10 GB |
| Software | PDAnalyze |
| Data acquisition | Digital, 22 MHz processor, 256 raw data channels |
| Light source | Long term stable LED |
| Operating system | Windows 10 IoT Enterprise |
| Power consumption | < 20 W |
| Installation conditions | -20 – +50 °C |
| Response time | 1 s, moving average configurable |
| Aerosol conditioning | Optional: thermal with compact IADS |
| Dimensions | 175 × 280 × 140 mm (H × W × D) |
| Weight | 2.4 kg |
| Linearity | 0.95 – 1.05 (measured against EN 16450 certified Fidas® 200) |
ISO 21501-1
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The Particles Plus® 7301-AQM1 and 7301-AQM2 Series Remote Particle Counter and Environmental Monitor measures 0.3 to 25 µm particles with mass concentration and stores indoor air quality measurements of temperature, relative humidity, CO2, (and TVOC in the 7301-AQM2). This instrument is the most versatile remote Air Monitor available, with advanced power management and the industry’s first sleep mode, allowing for battery operation of periods that can exceed a month on a single charge.
The 2510 particle counter provides a range of particle size measurement from 0.5 to 25.0 μm at a flow rate of 1.0 CFM (28.3 LPM). These sensors allow for efficient particle counting with specifications that exceed the ISO 21501-4 and JIS B9921 calibration standards.
The Particles Plus® 5301-AQM1 and 5301-AQM2 Remote Air Quality Monitor measures and displays particle mass concentrations for PM1, PM2.5, PM5 and PM10 including temperature, relative humidity, CO2 (and TVOC in the 5301-AQM2).
The 2301 particle counter provides a range of particle size measurement from 0.3 or 0.5 to 25.0 μm at a flow rate of 0.1 CFM (2.83 LPM). These sensors allow for efficient particle counting with specifications that exceed the ISO 21501-4 and JIS B9921 calibration standards. These sensors have 4 fixed particle size channels and are equipped with an integral critical orifice and flow sensor to provide a stable flow rate from an external vacuum source. Integration into a building automation or facility monitoring system is easy via isolated RS-485 Modbus communication.
The Particles Plus® 5501P Remote Particle Counter is the most feature-advanced remote particle counter available. Integration is easy into a building automation and cleanroom management system via Ethernet, or (optional) Wireless 802.11 b/g, RS485 or RS232.
The Particles Plus® 7501 Remote Particle Counter measures 0.5 to 25 μm with a flow rate of 0.1 CFM (2.83 LPM) and is the most versatile remote particle counter available. The 7501 can be used as a stand-alone battery operated instrument or it can be easily integrated into a building automation and cleanroom management system via Ethernet, or (optional) Wireless 802.11 b/g, RS485 or RS232.
Indoor Air Quality