Using a Gas Mass Flow Meter

You use a gas mass flow meter when you are trying to determine the amount of gas passing through and area of tube, piping or other cavity at any given time. Before purchasing your gas mass flow meter make sure that you have a clear understanding of what you expect to gain from the product first. 

For instance, there are flowmeters that are suited to heavy duty industrial processes. They may be able to handle a greater mass or may have more features. Or you may simply want a flow meter for your home that will perform one task that is small and occasional.

Also keep in mind that if you want to measure a liquid such as water you will want to purchase a liquid mass flow meter. Some meters will also not work when particulate matter is in the liquid and some a specifically designed to work with liquids with matter or bubbles in them.

Things to Consider Before Purchasing a Gas Mass Flow Meter

One of the features that may be standard in industrial plants is the need to transmit readings from the flow meter remotely. This may not be necessary for a device you use in the home. If this is a function that you will be requiring you will need to pick your meter accordingly. If you do select a gas mass flow meter that is capable of transmitting data remotely make sure its update frequency also corresponds with your expectations for the device.

Also consider how easy to install, calibrate and operate your gas mass flow meter should be. The complexity of these devices varies greatly from one product to another. If you just need a simple flow meter make sure to purchase a stand alone device that does not require attachment to a computer for configuration.

If repeatability is your greatest concern when purchasing a gas mass flow meter, select a device that has a limited amount of moving parts.  The fewer parts you having moving in the cavity of your gas mass flow meter will result in a more repeatable and consistent outcome.

If you know that the commodity you are trying to measure consists of large particles, you may be required to use a filter with your gas mass flow meter.  Check individual product specifications for details.

One possible drawback to using a flow meter is the possibility of pressure drop.  This is caused by the leaking of gas instead of the capturing of gas in the flow meter cavity.  Also keep in mind that your meter will need to be calibrated to whatever type of gas you will be testing.

Consider the available power supply for your gas mass flow meter.  Many devices offer optional battery packs if an electrical source is inconvenient or not feasible.  As with any battery operated device, products with this option are going to provide the user with fewer details and features.

A Gas mass flow meter will determine the mass of a flow of a particular gas through a pipe at any particular moment. In many cases the device will be calibrated for one gas. If you plan to use different gases, your flowmeter may have to be re-calibrated. Another option that many devices use is to have a conversion based on the characteristics of the control gas (initial calibration) in relation to the new gas.