AQSync:  Complete Air Monitoring Package

The AQSync is a compact and low-power monitoring station that provides fast measurements of all of the most important air pollutants, including O3, NO, NO2, CO CO2, PM1 and PM2.5, along with ambient temperature (T), pressure (P), relative humidity (RH), wind speed and wind direction.  All air pollutant measurements are optical measurements with the exception of CO, which is measured by a temperature-corrected electrochemical sensor.  Ozone is measured based on UV absorbance at 254 nm by our OEM-108-L ozone monitor.  NO2 and NO (after conversion to NO2 by reaction with O3) are measured by direct absorbance at 405 nm using the optical bench of our Model 405 nm NO2/NO/NOx Monitor.  PM1 and PM2.5 are determined by measurements using a MetOne optical particle counter, and CO2 is measured by infrared absorbance by means of a NDIR sensor.  The NO2 and O3 measurements are US EPA Federal Equivalent (FEM) methods for these two Criteria Pollutants. T, P and RH are measured along with wind speed and direction using a Response ONE 2-D sonic anemometer.  The package is housed in a rugged polymer enclosure (24 x 20 x 10 in, 61 x 41 x 25 cm) having a NEMA 4 rating for outdoor applications.  The AQSync is designed to provide the most accurate measurements the most important air pollutants using the small enough instruments to fit into a relative small and easily deployable package in outdoor environments.
 
The enclosure has a tamper-proof door with keyed access and can be equipped to mount on a pole of diameter 3 to 12 in (7.6 to 30.5 cm).  Supplied power is 110/220 ac and may be supplied optionally by a solar panel.  Operators can directly operate the system and change settings such as integration times, data transfer frequency and calibration factors  by accessing the user interface, either using the internal touchscreen or remotely via the cellular internet connection.  The individual measurement modules are designed to be easily removed for servicing.  Data are continuously transmitted to the web via a cellular connection, and a data logger with a removable microSD data card provides on-site data backup with more than a year of storage capacity.

The AQSync is being developed under a Phase II Small Business Innovative Grant from the National Science Foundation

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Features

• Measures O3, NO, NO2, CO, CO2, PM1, PM2.5, T, P and RH, wind speed and wind direction
• Ozone is measured by a Model 108 miniature ozone monitor, a US EPA Federal Equivalent Method (FEM)
• NO and NO2 are measured by a compact version of our Model 405 nm NO2/NO/NOx Monitor, a US EPA FEM
• CO2 measured by a non dispersive infrared (NDIR) optical instrument
• CO measured by a highly reproducible AlphaSense electrochemical sensor
• PM1 and PM2 measured by a MetOne optical particle counter eligible for testing for US EPA FEM certification
• Planned future upgrades will include measurements of black carbon via our Black Carbon Photometer, ammonia and sulfur dioxide by amperometry and BTEX by photoionization at 10.0 ev
• 2G/3G/LTE real time cellular data transmission to your server and/or the 2B Tech server
• Data console for online plotting and analysis of uploaded data
• Touchscreen
• Wifi connectivity addressable over the internet
• Ethernet
• microSD data storage
• Rugged NEMA 4 enclosure
• Modular design allows removal of individual instruments for servicing

Specifications

Instrument Specifications
Ozone (O3) Measurement Method: UV Absorbance at 254 nm Instrument: 2B Technologies Model 108-L Linear Range: 0-100,000 ppb Precision: 1.5 ppb or 2% of reading for 10-s avg Accuracy: 1.5 ppb or 2% of reading Response Time: 4 s for 2-s avg, 20 s for 10-s avg	Nitrogen Dioxide (NO2) Measurement Method: Direct Absorbance at 405 nm Instrument: 2B Tech Model 405 nm NO2/NO/NOx Monitor Linear Range: 0-10,000 ppb Precision: 0.5 ppb Accuracy: 2 ppb or 2% or reading Response Time 20 s
Nitric Oxide (NO) Measurement Method: Oxidation to NO2 with O3       followed by Absorbance of NO2 at 405 nm Instrument: 2B Tech Model 405 nm NO2/NO/NOx Monitor Linear Range: 0-2,000 ppb Precision: 0.5 ppb Accuracy: 2 ppb or 2% of reading Response Time: 20 s	Particulate Matter (PM1, PM2.5) Measurement Method: Optical Particle Counter,       8 channels, 0.3-2.5 μm Instrument: Met One Instruments Model 9722 Linear Range: 0-1,000 μg/m3 Precision: 0.1 μg/m3 Accuracy: ≤ 5 μg/m3 + 15% of reading       (better with local calibration vs FEM/FRM) Response Time: 1 s
Carbon Dioxide (CO2) Measurement Method: Non Dispersive Infrared (NDIR) Absorbance Instrument: PP Systems CO2 Gas Analyzer, Model SBA-5 Linear Range: 0-1,000 ppm Precision: 1 ppm Accuracy: 5 ppm Response Time: 10 s	Carbon Monoxide (CO) Measurement Method: Amperometry Linear Range: 0-50 ppm Sensor: Alphasense CO-A4 Precision: 0.02 ppm Accuracy: 0.1 ppm Response Time: 20 s
Physical Specifications
Weight	35 lb, 15.9 kg
Power	25 watt (42 watt during warmup)
Sample Flow Rate	3 L/min
Size	24 x 20 x 10 in (61 x 41 x 25 cm)