Measuring moisture or other gases with a laser has many advantages. Laser gas mixture

First, the laser does not affect the composition and shape of the gas being measured.

Secondly, it can measure the dangerous gas in a remote non-contact way to ensure the safety of the test personnel.

Thirdly, its measurement accuracy is very high, and the measurement lower limit may reach PPM level.

Fourth, the monitoring of each gas corresponds to a specific laser wavelength, so there is no cross interference and it is easy to detect specific components in the mixed gas.

Fifth, the sensor is completely optical structure, the essence is safe, the sensing end is not easily interfered by electromagnetic radiation, no spark is generated;

Sixth, the laser response speed is very fast, can reach the millisecond scale.

"In particular, the response speed of laser is slower than that of traditional measuring instruments," said the expert.

As is known to all, the measurement of humidity is in extreme conditions for most of the time, which increases the difficulty of monitoring, for example, the measurement of humidity in the high-temperature and high-pressure environment is a difficulty. Compared with the traditional measurement method, using laser to measure the humidity at high temperature has the advantages of no cross interference, large measurement scale, high precision and real-time measurement, and can complete real-time monitoring of the humidity at high temperature. "Once developed, this laser high temperature humidity sensor will improve the level of humidity monitoring in China, improve the accuracy of environmental emission measurement and reduce emissions from industrial processes. In the future, this skill could be extended to detect all kinds of gases.