Copyright Resonance Ltd., December 2011143 Ferndale Drive North, Barrie, ON L4N 9V9 Tel: 705-733-3633 Fax: 705-733-1388 Email:res@resonance.on.caSO2 and NO2, gases selectively and characteristically absorb light from scattered solar radiation (skylight) as it passesthrough the atmosphere. By correlating the resulting absorption spectrum with corresponding reference spectra etchedonto a disc inside the unit, the COSPEC measures, in real time, the integrated concentration of SO2 or NO2 along the lineof sight, independently of the presence of other potentially interfering gases.The COSPEC, incorporating a unique proprietary mask design, has a high signal to noise ratio and is sufficiently sensitive to track plumes over great distances under adverse weather conditions. Internal signal processing compensates for changing ambient light levels and diurnal spectral shifts.Over 180 COSPECs are currently in use worldwide.Technical InformationCorrelation SpectrometerCOSPECSO2 and NO2 transmission spectra, each with three typical backgrounds.Schematic diagram of COSPEC
Copyright Resonance Ltd., December 2011
143 Ferndale Drive North, Barrie, ON L4N 9V9 Tel: 705-733-3633 Fax: 705-733-1388 Email:res@resonance.on.ca
SO2 and NO2, gases selectively and characteristically absorb light from scattered solar radiation (skylight) as it passes
through the atmosphere. By correlating the resulting absorption spectrum with corresponding reference spectra etched
Correlation Spectrometer
COSPEC
SO2 and NO2 transmission spectra, each
with three typical backgrounds.
Schematic diagram of COSPEC
