Ml. Gurari et al., RESONANCE REFRACTOMETER FOR MEASUREMENT OF THE CONCENTRATION OF METHANE IN THE ATMOSPHERE, Measurement techniques, 41(3), 1998, pp. 233-238
A comparative analysis of the sensitivities of gas refractometers and
spectrometers is given. The functional diagram and description of the
operation of a refractometer-gas analyzer at a wavelength of 1666 nm a
re presented.