Infrared-optical gas measurement device for use in warning- and alarm system for monitoring concentration of e.g. explosive gas in industry, has split washers or perforated disks arranged in region of gas inlet opening

摘要

The device has split washers (10, 20) or perforated disks arranged in a region of a gas inlet opening and arranged on top of each other with preset distance, where the split washers exhibit reflective surfaces. Slit segments, slit-circular segments (27, 28), silt-ring segments, a light- and gas permeable cavity, upper- and lower circular rings, and upper- and lower rows of holes are covered by upper- and lower completely circular segments (25, 26), a circular ring segment, and a light- and gas permeable material in a vertical axis direction.