SootScan™ Model OT21 - Aerosol Magee Scientific

SootScan™ Model OT21

Optical Transmissometer Bench-Top Carbonaceous Aerosol Analyzer

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Product Overview

The SootScan™ Model OT21 Optical Transmissometer is a robust, bench-top laboratory instrument designed to analyze the Black Carbon (BC) and Brown Carbon (BrC) content of aerosol particulate matter collected onto filters.

Operating seamlessly both in the laboratory and deployed out in field settings, it delivers fast optical attenuation measurements in just a matter of seconds. Because the analytical framework is non-contact and completely non-destructive, your ambient or source-emission samples remain intact for retrospective chemical or archive validation testing.

Laboratory Spectroscopic Optics Research

Product Benefits

Dual Wavelength

Analyzes across two discrete spectral tracks: 880 nm (Definitive Black Carbon) and 370 nm (Biomass/Brown Carbon component validation).

Non-Destructive

Non-contact, non-contaminating optical path preservation enables your sample filters to be saved or reused in subsequent chemical assays.

Resource-Efficient

Requires no special support infrastructure, carrier gases, or specialized consumable reagents during general runtime operation.

Filter Versatility

Fully compatible with standard glass fiber, quartz fiber, and porous Teflon structural filter substrates across 25, 37, and 47 mm diameters.

Measurement Principle

The OT21 relies on light attenuation logic across collected substrate layers to extract mass load characteristics. The integrated internal light sources isolate quantitative absorption properties to delineate combustion source categories:

  • 880 nm (Infrared): Explicitly isolated to determine elemental fossil fuel soot / Diesel PM output.
  • 370 nm (Ultraviolet): Provides tracking for qualitative organic compounds and biomass woodsmoke markers.

Data output can be streamed via serial interface directly to standard PC operating software for archiving, calibration adjustments, and real-time validation tracking using a Neutral Density Photometric Standard Kit.

Core Applications

  • Air Quality & Ambient Air Monitoring Networks
  • Source Apportionment (Woodsmoke vs. Diesel PM)
  • Analysis of Historical Filter Archives
  • Stack and Stationary Source Emission Verification
  • Personal Exposure & Occupational Health Assessment
  • Internal Combustion Engine Mechanical Tuning

Technical Specifications

ParameterSpecification Details
Measurement Wavelengths 370 nm (UV) and 880 nm (IR)
Supported Filters 25 mm, 37 mm, 47 mm diameters (Glass fiber, Quartz, Teflon)
User Interface 2×20 Alphanumeric Character Display with 4-button tactile keypad
Power Demand 100–240 VAC, 50/60 Hz (Max power consumption: 15W)
Environmental Range Indoor use, 10°C to 40°C; 10% to 95% RH (Non-condensing)
Physical Chassis Dimensions 320 mm x 130 mm x 295 mm
Net Weight 5.5 kg