| 摘要 |
<p>There is provided a gas meter (100) comprising a filter (102), a main body portion (140), a covering portion (130) and a valve (112). Gas entering the filter (102) passes through an inlet assembly (104) into a first chamber (106). The gas then flows from the first chamber (106) to a measurement cell (108) in which flow parameters are measured. Gas proceeds into a second chamber (110) wherein the valve (112) is fixed. When the valve (112) is open the gas can escape into a third chamber (114) and thence to an outlet assembly (116). When the valve (112) is closed the gas is contained in the second chamber (110), the measurement cell (108) and the first chamber (106). Conventional gas meters have separate housing, for gas containment, and interior components, to form suitable measurement cells. <IMAGE></p> |
