Study on the effect of temperature on the ratio of signal to noise for NDIR gas analyzer

Abstract

In order to improve the signal-to-noise ratio of the non spectroscopic infrared gas analyzer and analyze the influence of the temperature stability in the infrared pool on the absorption of the gas, this paper makes a comparative test on the non spectroscopic infrared gas analyzer in the room temperature and constant temperature control environment. In the experiment, the high-precision constant temperature system with incremental PID algorithm is used to control the constant temperature point at 48 ± 0.1 °C, which is shown by the test comparison under the high-precision constant temperature system, The signal-to-noise ratio of the gas analyzer is improved obviously.