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2545 Central Avenue
Boulder, CO 80301
USA

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OPCRDS

OPCRDS (Open PATH CAvity Ringdown SPECTROMETER)

The Open Path Cavity Ringdown Spectrometer (OPCRDS) is the only in situ instrument capable of measuring light extinction coefficients and visibility at true ambient atmospheric conditions. Its open path design eliminates the need for inlet tubing and closed optical cavities, thereby avoiding impaction losses and evaporation from sample heating. The OPCRDS is ideally suited for visibility monitoring, remote sensing validation, and ambient measurements in regions where high relative humidity and coarse mode aerosol (e.g., dust) are important.

ReferenceS

Gordon, T. D., et al., Design of a Novel Open-Path Aerosol Extinction Cavity Ringdown Spectrometer, Aerosol Science and Technology, 49, 717-726, 2015.

Side view schematic (top panel) and top view CAD model (bottom panel) of the OPCRDS optical cavity. Air flows up through the optical cavity where it changes the ringdown time of a 674 nm laser depending on the true extinction coefficient of the air, particles and any water associated with the particles.

Side view schematic (top panel) and top view CAD model (bottom panel) of the OPCRDS optical cavity. Air flows up through the optical cavity where it changes the ringdown time of a 674 nm laser depending on the true extinction coefficient of the air, particles and any water associated with the particles.

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Technical Specifications

  • Size: 55" x 19" x 29" (W x D x H)
  • Weight: ~ 35 kg
  • Power: 100-240 VAC, ~250 W
  • Size range: all
  • Sample flow rate: ~1500 LPM through duct
  • Maximum concentration: ~ 300 Mm-1 (higher values possible depending on configuration)
  • Environmental operating conditions: -20 to + 40 C
  • Laser: 674 nm, 10 mW
  • Storage and communications: 8 GB USB memory, ethernet

Ordering Information

email: sales@handix.com
tel: +1 720 724 7658