Vacuum Measurement – Pirani Gauges

Pirani gauges are a group of indirect measuring pressure gauges which measure the thermal conductivity of the gas sample.  Pirani gauges are typically used in the fine vacuum range (1 torr – 10-3torr), as this is the range where they achieve the best accuracy.   A typical accuracy spec for these indirect-reading gauges is ±15%…

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Vacuum Measurement – Capacitive Gauges

In one of our prior posts, we talked about the key differences between direct and indirect vacuum gauges.  One of the most common direct gauge technologies is the capacitive gauge.  This post will review how these gauges are constructed and how they work. At their core, capacitive gauges consist of a thin diaphragm and two…

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Vacuum Measurement Made Easy

Finding a vacuum gauge for monitoring chemical processes can be a challenge.  There are few gauges that simultaneously cover the appropriate vacuum range with sufficient accuracy and have the ability to cope with regular exposure to aggressive chemicals.  VACUUBRAND’s VACUU·VIEW™ and VACUU·VIEW extended™ gauges address these needs. These compact, easy-to-use gauges are designed for long life,…

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Vacuum Measurement – Direct & Indirect Gauges

Because vacuum technology spans 15 orders of magnitude (103 mbar – 10-12 mbar, or 760 torr – 10-12 torr), there is no single vacuum gauge that can cover the full range.   Consequently, a number of different gauge technologies have been developed in order to measure vacuum within ranges of common interest.  These various gauge…

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Vacuum Pump Sizing – Estimating Flow Rate

In our last post, we talked about our pump selection guide as one tool that we’ve made available to identify the right vacuum pump for your needs.  This is a great tool to use to quickly narrow down your options, especially if you have a sense of your operating parameters. But sometimes people are not sure…

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Vacuum Pump Sizing – Selection Guide

Another question that we often hear from our customers is, what pump do I need?  The right answer depends upon a variety of factors – such as the nature of the process or application, the working pressure and/or flow rate required, the desired process time, if the pump will be exposed to aggressive chemicals, and…

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Vacuum Unit Conversion

One of the most common issues we help customers with is how to measure units and communicate that information to others.  While this might sound simple, there are a multitude of units used to measure pressure.  The potential for confusion is often confounded by the fact that pressure (and thus vacuum) can be measured on…

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Diaphragm Vacuum Pumps In Process Operations

Vacuum is a very widely used utility in the process industries – from pharmaceutical and chemical to food and biotechnology. While some applications require fairly deep vacuum – so-called “fine” vacuum – many other operations rely on vacuum in the “rough” range. These rough vacuum applications include suction operations to drive liquid movement or accelerate…

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The Chemical Resistance of Vacuubrand’s Pumps

For many people, one of the most important features to consider when sourcing a vacuum pump is the ability of that pump to hold up over the long term.  Pumps are exposed to a wide range of operating conditions that could lead to premature pump failure if the wrong pump is selected.  VACUUBRAND’s chemical resistant…

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Cost Savings With Process Vacuum – Part 2

In light of the operational concerns reviewed in Part 1, this chemical recycling firm decided to evaluate different pump technologies.  Fortunately, recent advances in vacuum pump technology make dry-running pumps a viable option for many of those currently using liquid ring pumps.  Dry pump technologies like chemical-resistant diaphragm pumps can be considered as a viable…

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