The 3.5-inch large-screen display has a beautiful appearance and a 3.5-inch high-definition color screen with a wide viewing angle of 150 degrees. Applicable to humid and dusty harsh monitoring environments. The air chamber structure makes detection faster. Multi-gas simultaneous measurement display mode switching.The instrument can detect 1-5 kinds of gas concentrations at the same time. The gas concentration data display and the real-time curve display mode of the gas concentration can be switched. Intimate design - flashlight function, illuminates the darkness for some workplaces, making underground operations easier. Optional fall alarm function ensures the safety of underground operators Optional 360-degree bending suction probe that is not easily deformed, detachable, and the length is greater than or equal to 130MM The suction probe adopts a double-layer pipeline with a PTFE layer inside, which does not absorb gas; an external spring protection layer is added.