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Tag: vacuum gauge

What is a Vacuum Gauge? Sun, Oct 20, 2024

A vacuum gauge is a precision tool designed to measure pressure below atmospheric pressure. By using local air pressure as a baseline (0), it tracks exactly how much gas or air has been removed from a sealed system—displaying results in units like Pa, mBar, mmHg, or Micron.

In the professional world, these instruments serve three critical functions:

Verifying target vacuum depths.
Detecting system leaks.
Monitoring equipment performance.

Whether you are evacuating an HVAC unit, diagnosing a car engine, or controlling a chemical reactor, choosing the right gauge is vital. This comprehensive guide breaks down how vacuum gauges work, compares them to pressure gauges, and provides a clear roadmap to help you pick the perfect model.

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Types of Vacuum Gauges Sat, Oct 19, 2024

A vacuum gauge is an instrument used to measure the degree of vacuum or air pressure. Generally, the measurement of air pressure is based on the changes in a certain physical effect under different air pressures. Widely used in scientific research and industrial production. The main component of a vacuum gauge is a hot cathode, and the heat emitted electrons generated during its operation ionize the gas. This ion flow is proportional to the number density of gas molecules. When all other parameters, including temperature, are constant, the size of the ion flow is proportional to the air pressure, and the air pressure value can be obtained by measuring the ion flow. The hot cathode ion gauge is mainly composed of three electrodes, namely cathode, gate, and collector.

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