GAS ANALYSER Russian patent published in 2024 - IPC G01N21/39 

FIELD: measuring equipment.

SUBSTANCE: invention relates to measurement equipment and can be used to measure concentration of gases: hydrogen, carbon monoxide, carbon dioxide, methane, acetylene, ethylene, ethane, dissolved in transformer oil. Gas analyser for gases dissolved in oil comprises a control unit installed in a single housing, vacuum extractor for extraction of gases from oil, connected by hydraulic lines for input of oil from transformer to extractor and its output, communicated with extractor and made in form of optical system according to Herriott scheme for multiple passage of laser radiation from one mirror to another and measuring its intensity at the output, a measuring cell for measuring concentration of gases, which is connected to a laser module and a reference channel for calibrating the wavelength of lasers. Membrane unit is installed between the extractor and the measuring cell to prevent ingress of oil into the measuring cell. Laser module is configured to operate each of the three lasers included in it at a certain wavelength to provide measurements for various gases included in the gas mixture. Reference channel includes a glass transparent container for tight filling with a mixture of gases and a photodiode. Mirrors of the measuring cell are equipped with heaters, and the measuring cell itself is equipped with heat insulation elements. Extractor is equipped with pressure sensor and is made with possibility of its automatic calibration due to installation of level sensors in it at different levels and performing extraction at the installation level of these sensors with subsequent measurement of gas concentration for these levels and determination of the gas solubility coefficient.

EFFECT: higher accuracy of measurements.

1 cl, 7 dwg