Find Out How To Use A Vacuum Pressure GaugeA vacuum pressure gauge is used to measure pressure in a vacuum. There are two different reference points that one can have when measuring vacuum pressure: one can measure it in respect to local atmospheric pressure or in relation to absolute zero vacuum. Both types of pressure gauges will be measuring basically the same thing but relating it to a different reference point means that you will get two different results which is what you might need depending on the situation and you will never actually be measuring the same thing with both types of gauges. For instance if you want to make sure that a vacuum pump is producing adequate suction pressure or if you want to maintain a slightly lower pressure in a room, maybe a laboratory where various exotic or toxic gases are released, than the local barometric pressure to ensure that no air escapes you will want to measure negative vacuum gauge pressure. This will ensure that when the barometric pressure outside changes you will be able to maintain the suction pressure and containment of the air inside the room below it at all times. On the other hand there are many applications in which you will need to check the vacuum pressure in relation to absolute zero vacuum, like in the case of environmental chamber or whether or not the vacuum seal meant to preserve foods is in fact properly achieved. In these cases you need a certain amount of pressure and vacuum which are fixed and unrelated to the ambient barometric pressure because it will not have any effect your result in any way. Your basic negative gauge pressure range is zero to minus one bar gauge however if the barometric pressure is below one bar absolute then minus one bar can never be achieved and on the other hand if the barometric pressure is above one bar absolute then you won’t be able to measure the full vacuum. In some circumstances you will need a compound pressure range which is basically a combination of negative gauge pressures and positive pressures meant to be used in processes that involve both vacuum purging and pump filling. However the usual absolute pressure range is zero to one bar absolute. It is important to mark and understand the difference between negative gauge and absolute reference vacuum ranges because while it may seem that they are in fact measuring the same thing but in different directions it is important to understand which type of reference you need before you select a certain pressure gauge. Depending on the exact type of application that you need a vacuum pressure gauge for it is always considered a good idea to do some research on your own and maybe a bit of shopping around as well. Go on the Internet and look for information and review on certain gauge manufacturers as well as products that you might be considering. Sometimes you can find first hand experiences posted on message boards and forums from individuals who have done exactly what you are planning on doing and you can sometimes get great tips and ideas from such individuals and places. |
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