Gas flow meter
Accurate measurement of gas flow is necessary in the operation or control of many processes. There are several methods for measuring the volumetric flow rate of a gas. Indirect measurement methods include pressure drop across an orifice, mechanical movement, heat transfer, or ultrasound interference. Gas flow meters are usually designed with a plurality of moving parts encased within an enclosure where the enclosure is designed to maintain structural stability between a maximum rated high internal pressure and external atmospheric pressure. Ultrasonic gas flow meters utilize a technique in which the difference between the time of travel of an ultrasonic wave upstream in a flowing gas and the time of travel of an ultrasonic wave downstream in the flowing gas is used to determine the flow rate of the gas. However, other techniques are also known and used. A thermal flow sensor is one example of a device used to determine the flow rate of a fluid. The mass flow rate of a fluid is known to be proportional to the amount of heat required to elevate the fluid temperature by a fixed amount as it flows through a laminar flow channel. Thermal gas flowmeters have been predominant as flowmeters for an amount of intake air provided in an electronic control fuel injection system of an internal combustion engine such as for automobiles. The air flow meter detects a change of heat absorbed by the air-flow from a portion where the heating resistor heats, or a change of temperature in the vicinity of the heated portion, thereby attaining the air flow amount. Axial flow turbine meters are widely used for measuring flow of gas by which to determine gas usage and the like. An axial flow turbine meter includes a meter body having an inlet end connected to a gas supply line or pipe and an outlet end which may be connected to a gas delivery line or pipe.
There's no product listing here. Be the first to
submit your product information.
Related products