Wheatstone Bridge Circuit

One of the many important tasks to an industrial hygiene professional is to detect different gases in the air. Now this may seem to be a fairly simple process due to the fact that most gases have a particular scent associated with them that makes their presence known and felt by people near it. But what happens when the gas your trying to identify does not have a scent and is no able to detect without the use of a meter or detectors. For gases such as carbon dioxide and other gases that are formed from combustion that are odorless certain type of detector is used to find these potentially lethal gases is a special type of detector that uses a circuit called a Wheatstone bridge circuit. This type of circuit is uniquely designed to tests for these odorless gases. What makes it special for testing is the way the filament inside of it heats up and tests the air. The electrical circuit can read the smallest changes in temperature which will tell device that there is an imbalance in the air around it. It is then identified by this change in temperature and is then read on the screen of the device. Often read is a change of percentage that is triggered to database which will tell the user what gases surround them. These tools are very helpful in identifying the gases when they are not able to be detected by our normal senses. Without the use of these sensors there could, potentially have been mass poisoning of people and possible deaths without the person even knowing what is happening to them before it’s already too late. We can thank the advances in technology over the past few hundred years for use to be able to live our lives safely without the fear of getting poisoned by odorless gases.