Absolute Pressure Sensor: The Perfect Vacuum

A vacuum is not always the classic vacuum that lives in residential closets and gets taken out to suck up cat hair, dog fur and spilled cereal. Some vacuums are used in much more scientific applications, employing the same general idea as commercial vacuums but in a very different way. The phrase “perfect vacuum” refers to the pressure difference between absolute pressure and the atmosphere. Perfect vacuum is a standard that the absolute pressure is built upon, creating a measurement by way of and through the perfect vacuum. It involves space, but not the sucking up kind.

Absolute pressure sensors utilize the perfect vacuum formula for the final read out translation and also utilize all the classic pressure sensor elements as well. For example, pressure transducers are the pressure sensor part that translates the signal from the liquid or gas flow into a readable display for a human worker to read and record. The signal is picked up by sensors immersed within or placed directly outside of the substance being measured, which are also attached to the transducer and display face. Often made from metallic material that is durable and resistant to water and chemical corrosion, absolute pressure sensors are also often covered in plastic in parts. The display screen may be a gauge, digital screen or other view that is readable by maintenance workers.

The perfect vacuum is a concept that is only incorporated into the system of absolute pressure sensors, which are one of five major pressure sensor categories. The type of measurement is very useful in a variety of industries, including chemical processing, waste water recovery facilities, medical environments, automotives and aircrafts, as well as many others. Basically, any industry that has something to do with flowing fluid or gas requires some sort of pressure transducer to keep tabs on the process, and absolute pressure sensors are at the top of the list as far as accuracy goes.

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