Description: Glass Tube Rotameter is a device that measures the flow rate of liquid or gas. It operates on the variable area principle, where the fluid flow raises a float in taper tube, increasing the area of passage of fluid. The height of float is directly proportional to the flowrate The taper glass tube is formed of borosilicate glass of extremely high accuracy of bore obtained by collapsing the taper tube while in hot and plastic state on a precision ground and polished mandril. The tubes are then annealed in furnace to relieve the stress formed during manufacturing. Floats of various configuration and material are used for a wide range of application depending upon flowrate, viscosity and turbidity of fluid. The float has a sharp metering edge where the reading is observed by means of scale mounted along side of the tube. The scale of rotameter is calibrated to directly read the fluid flow. Maximum of 200?c temperature is needed for this rotameter to operate. The body is coated with M.S powder coats. The rotameter has an accuracy of ±2% of FSR.
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