The invention discloses a high-reliability sensitive component, which structurally comprises a
barrel, a filter screen and a sensor device, wherein the filter screen is arranged in the middle of the right side of the
barrel, the sensor device is installed above the
barrel, a fixing mechanism is arranged in a protection shell, the small-
diameter section and the large-
diameter section of a sensor are fixed to a position supporting mechanism, the large-
diameter section is locked through a clamping mechanism, the middle section of the small-diameter section is erected in the middle of a supporting plate, the
tail end of the small-diameter section is positioned and locked through a positioning mechanism, a conversion element is locked in the protection shell through a screw, a rubber
cushion is compressed during locking so as to make the conversion element and the bottom end in the protection shell be in a seamless state to prevent a measurement
data error caused by a hole seam in a working process, when the conversion element is locked, a switching circuit is attached to a power supply interface at the back end of a
signal interface at the same time so as to achieve electric connection, and after the conversion element is locked, a cover plate covers and is locked by a screw so as to protect the fixing mechanism, so that the work is in a dust-free environment, and external
dust pollution can be effectively prevented.