Cavity ring-down spectroscopy (CRDS) is an optical technique used for measuring very low absorption coefficients usually in gases. By measuring absorption coefficients of a gas at particular wavelengths it is possible to assess the gas concetrations with high precision.
OPTEK has built and delivered a CRDS system equiped with 266 nm pulsed laser for measurement of acetone concentration. During the development of the device custom optical system and software were created. The tool allows measurement of acetone concentration in real time with 1 ppm resolution.