This Architectural Drawing is of Detail Drawing of remote mount. A flow meter is a device that measures the flow rate of a fluid. Flow meters are flow measuring instruments used to measure the linear, nonlinear, mass, or volumetric flow rate of a gas or a liquid. Flow meters are also known as Flow Gauges or flow measurement instruments. There are two categories of flow meters: gas and fluid or liquid. Fluid flow meters have five subcategories: differential pressure, velocity, positive displacement, mass flow, and open channel. For details download the drawing file.