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Ambient Air Monitoring Instruments


List of Ambient Air Monitoring Instruments
Teledyne Aethalometer Model 633

Teledyne Aethalometer Model 633

The Model 633 Aethalometer® is used to measure ambient concentrations of black carbon in air in real time. The instrument continuously collects airborne particles onto a fiber filter and actively measures the light absorbing properties of the sample in real-time.​

Manual

URG 3000N Black Carbon Sampler

URG 3000N Black Carbon Sampler

The Model 3000N sampler draws ambient air at a constant flow rate though a specially shaped inlet where particulate matter smaller than 2.5 mm in aerodynamic diameter is inertially separated from larger particles and is collected onto a filter. The PM2.5 particles are collected on quartz filters. These filters are analyzed for organic and elemental carbon using Thermal Optical Reflective (TOR) analysis method.

Manual

Thermo 48C Enhanced Trace-Level Carbon Monoxide Analyzer

Thermo 48C Enhanced Trace-Level Carbon Monoxide Analyzer

The Model 48-C measures the amount of carbon monoxide in the air in real time. CO absorbs at around 4.7 microns. CO analyzers pass an IR beam alternatively through a reference cell containing a non-absorbing gas (N2) and a sample cell containing the ambient air sample with CO. The amount of the 4.7 microns IR light absorbed corresponds to the CO concentration. The difference in the measured intensity between the sample cell and reference cell is converted to a CO concentration using the Beer-Lambert Law. The instrument uses an exact calibration curve to accurately linearize the instrument output over any range up to a concentration of 1000ppm.

Thermo 48i TLE Enhanced Trace-Level Carbon Monoxide Analyzer

Thermo 48i-TLE Enhanced Trace-Level Carbon Monoxide Analyzer

Using gas filter correlation technology, the Model 48-TLE measures the amount of carbon monoxide in the air in real time. CO absorbs at around 4.7 Um. CO analyzers pass an IR beam alternatively through a reference cell containing a non-absorbing gas (N2) and a sample cell containing the ambient air sample with CO. The amount of the 4.7 microns IR light absorbed corresponds to the CO concentration. The difference in the measured intensity between the sample cell and reference cell is converted to a CO concentration using the Beer-Lambert Law. The instrument uses an exact calibration curve to accurately linearize the instrument output over any range up to a concentration of 1000ppm.

Thermo 42i NO2/NO/NOx Analyzer

Thermo 42i NO2/NO/NOx Analyzer

The Model 42i uses chemiluminescence (energy in the form of light ) to measure oxides of nitrogen from sub parts per billion (ppb) to 100 parts per million (ppm). Ozone (O3) is added to the sample in a reaction cell. Nitric oxide (NO) and ozone (O3) react to make nitrogen dioxide (NO2) and oxygen (O2). The NO2 produced by this reaction is in an excited state, as it return to normal, light energy is emitted. Since one NO molecule makes one NO2 molecule, the intensity of the light emitted is directly proportional to the NO concentration in the sample. The chemiluminescent reaction only occurs between O3 and NO. To determine the NO2 concentration, the ambient air stream passes through a converter which reduces any NO2 present to NO before entering the reaction cell. The analyzer measures the amount of light emitted by the reaction and converts this to a NO concentration. The differences between NO concentration in the converted and unconverted gas streams gives the amount of NO2. User programmable software capabilities allow individual measurement range settings to be stored in memory for subsequent recall and NO, NO2, NOX, hourly average storage for up to one month

Thermo 49i O3 Analyzer

Thermo 49i O3 Analyzer

The Model 49i uses UV photometric technology to measure ozone from parts per billion (ppb) to 200 parts per million (ppm) in real time. Ambient air is drawn through a cell in which the absorption of UV radiation is measured at the 254-nm emission line of a mercury lamp. A second sample that has had O3 removed using a manganese dioxide (MnO2) scrubber is drawn into the absorption chamber. This sample serves as a “blank.” Since the “blank” has had all its O3 removed, the UV light intensity detected from this sample will not be reduced. The difference in the intensity of the two is used to calculate the concentration of O3 in the sample.

Met One BAM-1020 Continuous Particle Monitor

Met One BAM-1020 Continuous Particle Monitor

The BAM-1020 automatically measures and records airborne particulate concentration levels (in milligrams or micrograms per cubic meter) of PM10 in near real time using the industry-proven principle of beta ray attenuation. At the beginning of each sample hour, a small carbon-14 element emits a constant source of high-energy electrons (beta rays) through a spot of clean filter tape. These rays are detected and counted by a detector to determine a zero reading. The BAM-1020 then advances this spot of tape to the sample nozzle, where a controlled amount of outside air flows through the filter tape. At the end of the sample hour, this dust spot is placed back between the beta source and the detector, thereby causing an attenuation of the beta ray signal which is used to determine the mass of the particulate matter on the filter tape. This mass and the measured air volume are used to calculate the volumetric concentration of particulate matter in ambient air.

Manual

Thermo PartisolTM 2025 Manual PM2.5 Particle Monitor

Thermo Partisol 2025 Manual PM2.5 Particle Monitor

The Partisol®-Plus2025 Sampler draws a particulate-laden ambient air stream through a PM 2.5 size selective or inlet, and then through a 47mm diameter filter. Filter exchange is performed using pneumatic pressure from the sample pump. New filter cassettes from the supply magazine are pushed up to the sampling position, while the previous cassette is moved to the storage magazine. The supply and storage magazines are covered to seal off filter cassettes when not used for sampling. In the lab, the filter is weighed (after moisture equilibration) before and after use to determine the net weight (mass) gain due to collected PM10. The total volume of air sampled, corrected to EPA reference conditions (25 ºC, 101.3 kPa), is determined from the measured flow rate and the sampling time. The mass divided by the corrected volume give the PM2.5 concentration.

Thermo PartisolTM 2025i Manual PM2.5 Particle Monitor

Thermo Partisol 2025i Manual PM2.5 Particle Monitor

The Partisol®-Plus2025 Sampler draws a particulate-laden ambient air stream through a PM2.5 size selective or inlet, and then through a 47mm diameter filter. Filter exchange is performed using pneumatic pressure from the sample pump. New filter cassettes from the supply magazine are pushed up to the sampling position, while the previous cassette is moved to the storage magazine. The supply and storage magazines are covered to seal off filter cassettes when not used for sampling. In the lab, the filter is weighed (after moisture equilibration) before and after use to determine the net weight (mass) gain due to collected PM10. The total volume of air sampled, corrected to EPA reference conditions (25 ºC, 101.3 kPa), is determined from the measured flow rate and the sampling time. The mass divided by the corrected volume give the PM2.5 concentration.

MetOne SuperSASS Monitor

MetOne SuperSASS Monitor

The SuperSASS is a 8 channel multiple event sampling system used as part of the U.S. EPA’s Chemical Speciation Network (CSN) to monitor trends of the major components of small particles (PM2.5) in ambient air: ions (ammonium, sulfates, and nitrates), organic and black carbon, trace metals, and total mass. The CSN was created in 1997 in support of the new National Ambient Air Quality Standards (NAAQS) for particulate matter. The 24-hour time integrated samples are collected on a different filter media and air volume is measured in order to calculate the concentration of the pollutant in question. MetOne SASS samples are analyzed for total mass, organic and black carbon, ions (cations and anions) of concern, and trace metals.

Manual

TSI UFP3031 Ultrafine Particle Counter

TSI UFP3031 Ultrafine Particle Counter

The UFP3031 (Ultrafine Particle) Monitor operates continuously, 24-hours a day. The operational principle is based on diffusion charging of particles, followed by size segregation within a Differential Mobility Analyzer (DMA) and detection of the aerosol via a sensitive electrometer electrometer where by successively stepping the DMA voltage and measuring the current at each step with the electrometer, an on-board computer calculates and reports the number concentration for each of the six size channels.