This article was originally published on December 13, 2021, and was updated on February 4, 2024. Different industrial applications require different types of gauges to measure pressure at various points of the process. Mechanical pressure gauges, for example, can be used to measure absolute pressure, vacuum pressure and compound pressure. If you’re not selecting the appropriate kind of pressure to be measured, your gauge may not provide you with the required “readable” pressure scale. Ashcroft has been manufacturing pressure and temperature instrumentation since 1852 and as the senior product manager for process gauges, I have been fielding questions on the subject for the past 15 years. In this article, I will take you through the various types of pressure and review the different gauges and transducers available to meet your specific pressure needs.

A pressure gauge is a mechanical instrument that is used to measure and monitor the pressure of air, gases or fluids in process, commercial and industrial systems. These devices operate using the system’s process, meaning they will give you a reading even when you have no power source. But to understand pressure gauges and how they work, you need to start with the basics. Ashcroft has been making these instruments since 1852 and we wrote this article to give you a foundation of information that you can use as a reference. Read on to learn about the different types of pressure gauges (process, commercial, industrial, digital) and their functional components. Also become knowledgeable of gauge operating principles and construction, manufacturing standards, sensing and scale elements for various applications, dial options, and more. When you are done reading, you will also find additional resources that may interest you.

Protect your pressure gauge from the effects of overpressure with Ashcroft’s new option XRA for the 1209 pressure gauge. This 4 ½-in. stainless steel, solid front pressure gauge now offers option XRA to accommodate up to 417% overpressure without damaging the gauge. In applications where pressure spikes, surges and water hammer are a possibility, option XRA reduces the need for an external pressure limiting valve while extending gauge capacity. The 1209 is also available with optional liquid fill or the patented PLUS!™ Performance option to dampen shock, vibration and pulsation. This review will look at the new option for this pressure gauge and how it can provide reliable pressure measurements for your high-pressure application.

Some pressure instruments require a fill fluid to help with pulsation and vibration in certain applications. Filling the cavity of a pressure gauge with liquid lubricates and dampens the internal components to reduce or eliminate the effects of heavy vibration and/or pulsation. A system fill is commonly used in assemblies when one or more instruments are installed above a diaphragm seal. There are many types of fill fluid options available today, so which one is best for your application?

High-purity applications require a particular type of pressure gauge to ensure accuracy, safety and repeatability. The materials from which it’s made and its safety features must be specialized for demanding environments. Do you have the right high-purity pressure gauge for your process? Do you need enough space to have multiple devices measuring your process? Ashcroft’s newly released HPS high-purity pressure gauge with reed switch might be right for you. This article will describe the features of this new gauge and how it can help keep your application, and business, running.