The invention discloses a minitype
laser methane sensing probe. The minitype
laser methane sensing probe comprises a filter screen cover, an
air chamber core, a circuit board, a front sleeve, a transfer sleeve and a cable. According to the minitype
laser methane sensing probe, the design of a stacked-structure circuit is adopted, the problem that the size of the probe is affected by the huge volume of the circuit is solved, the waste of the space of the probe is reduced, the whole volume of the probe is shrunk to 1 / 2 of the original volume under the condition that the
diameter of the probe is guaranteed, and great convenience is provided for the different special application occasions. The traditional distribution form of a laser and a photovoltaic conversion
receiver is changed, a group of reflectors are used, so that incident light emitted from the laser is reflected by the two mutually matched reflectors and is received by the photovoltaic conversion
receiver, the propagation path of light is changed through the reflectors, the optical distance of an
air chamber is increased by more than one time under the condition of the same volume, the effects of increasing the optical distance and saving the space are achieved, and the gas detection result is more accurate.