HTabsOverviewInformation: The microAeth® MA350 is a real-time 5-wavelength UV-IR Black Carbon monitor housed in an outdoor-rated case with an 85 sampling location automatic filter tape advance system which allows for up to 15 months of continuous measurements. The device is a self-contained instrument with built-in pump, flow control, data storage, and 4X the battery capacity of the MA200. The MA350 also features onboard GPS, satellite time synchronization, accelerometer, altimeter/barometer, and sensors for relative humidity and temperature. Wireless communication interfaces are under development to provide future network or mobile smart device integration. The MA350 is designed as a network node to be installed outdoors on street poles and along fence lines for extended multi-month measurement campaigns with low maintenance and infrequent site visits. The 85 location filter tape cartridge allows for long term continuous sampling of higher concentrations for up to a year depending on the sampling environment conditions and instrument settings. The spectrum measurement provides insight into the composition of light absorbing carbonaceous particles and helps to distinguish among the different optical signatures of various combustion sources such as diesel, woodsmoke, biomass, and tobacco. The instrument supports the DualSpot® loading compensation method which corrects for optical loading effects and provides additional information about aerosol optical properties. Applications: Continuous real-time monitoringMobile monitoringMulti-month filter lifeExposure assessmentHealth effectsOccupational safetySource apportionmentTobaccoWoodsmokeBiomass Ambient air monitoringStationary monitoringIndoor air qualityVehicle on-road mobile monitoringNetworksFence line monitoringNear-road monitoringUrban environment on street polesHigh concentration / Cookstove monitoring Information Brochure: microAeth MA350 Specifications Sheet Rev 03 Updated Oct 2021.pdf SpecificationMeasurement Parameter: Black CarbonSpecification: Measurement Method Real-time Aethalometer® method, 5 wavelength absorption analysis by measuring the rate of change of transmitted light due to continuous particle deposition on filter. Measurement at 880 nm interpreted as concentration of Black Carbon (‘BC’). Measurement at 375 nm interpreted as Ultraviolet Particulate Matter (‘UVPM’) indicative of woodsmoke, tobacco, and biomass burning. Measurement Wavelengths 880 nm, 625 nm, 528 nm, 470 nm, 375 nm DualSpot® Loading Compensation Real-time analysis by measuring the rate of change in absorption of transmitted light due to the continuous collection of aerosol on filter. Simultaneous collection on two spots in parallel at different flow rates. Timebases 1, 5, 10, 30, 60, or 300 seconds Flow Rates Internal pump provides 50, 75, 100, 125, 150 or 170 ml/min. DualSpot® compensation not compatible with all settings. Measurement Range Per sampling location, 0-1 mg BC/m3, filter sampling location lifetime dependent on concentration and flow rate setting, decreasing proportionally with lowest wavelength optical source enabled:IR only mode, average 5 μg BC/m3 for 24 hours at 100 ml/minIR only mode, average 100 μg BC/m3 for 3 hours at 50 ml/minIR only mode, average 1 mg BC/m3 for 15 minutes at 50 ml/min Measurement Resolution 0.001 μg BC/m3 Limit of Detection 30 ng BC/m3, 5 min timebase., 150 ml/min flow rate, SingleSpot™ Pump Options Standard internal diaphragm pump Flow Control Internal mass flowmeters with closed-loop control Filter Material / Capacity MA300/350 Filter Tape Cartridge with Polytetrafluoroethylene (PTFE) material (85 sampling locations) Sampling 3 mm diameter spot(s) created on filter tape. User selectable DualSpot® or SingleSpot™ mode. Environmental Sensors Accelerometer, Relative Humidity, Temperature, Altimeter/Barometer Dimensions L: 199.90 mm (7.87 in), W: 99.82 mm (3.93 in), D: 69.85 mm (2.75 in) Weight 965 grams (34.04 ounces) Memory 16 GB internal flash memory, providing storage for 31,250,000 data lines; 1 second timebase: 361 days of data. On-board Interface Low power screen, 3 buttons Location Services GPS with Internal Antenna Date/Time Format ISO 8601 with satellite synchronization or manual computer synchronization Wireless 802.11 b/g/n Wi-Fi with AES hardware encryption, Bluetooth Low Energy. Available in future firmware releases. Connections Via external sealed connector for 3.3V TTL Serial and DC input via barrel jack, Aerosol sample inlet and outlet ports, USB 2.0 on inside panel USB Communications / Client Application USB connectivity to cross-platform microAeth® Manager software available on macOS® and Windows®. microAeth Manager software is included and facilitates settings configuration and data download. Exported data can be uploaded to AethLabs Dashboard server for processing and visualization. Serial Communication 3.3V TTL serial connectivity for uploading new instrument firmware, flow calibration, streaming data and polling protocols to request data, modify settings and control. Command line interface (CLI) polling protocols: AethLabs protocol and Bayern-Hessen protocol. Total Run Time Up to 56 hours at 60 second timebase, 100 ml/min flow rate on single battery charge. Run time may vary due to PM concentrations and settings. Battery Internal 3.6V 12800 mAh (46.08 Wh), 4 cell rechargeable lithium-ion battery Charging Fast charging DC via barrel jack AC adapter (~11.75 hours to full charge, instrument turned off) orUSB charging (~25.75 hours to full charge, instrument turned off)Power Supply Adapter: Input: 100~240 VAC 50/60Hz 0.4A, Output: 5VDC / 2A, with option for Type A, C, G, or I plug Operating Environment 5 ~ 40 °C operating, non-condensing. Included microAeth MA350, 1 MA300/350 Filter Tape Cartridge, MA350 Sealed connector to DC barrel jack and serial port cable, Barrel jack AC adapter with 1 territory-specific plug, USB communication/charging cable, 2 one meter sampling hoses with swivel tube connectors. Cross-platform microAeth® Manager software and manual available for download via AethLabs website Accessories & Consumables MA300/350 Filter Tape Cartridge, MA Series Flow Calibration Kit, microCyclone™ PM2.5 Size-selective Inlet, MA350 Sealed connector to bare leads cable, Serial to USB converter cable, Serial to bare leads cable, Portable Aerosol Dryer, MA350 Pole kit Further InfoFurther Info: The below poster was presented at the CASANZ 2018 Black Carbon meeting on the evaluation of the measurement of Black Carbon via microaeth in comparison with a rack mounted aethalometer (AE33) (open poster in new window) USEPA-AETHLABS-BLACK-CARBON BC SENSOR EVALUATION.png Documents: MA200 MA300 MA350 Quick Start Guide Rev 02 Mar 2024.pdf microAeth MA350 Specifications Sheet Rev 03 Updated Oct 2021.pdf
