Vacuum Measurement Equipment: Cold Cathode Technology

Accurate pressure measurement is key in vacuum-assisted production. Only the right pressure can ensure the efficiency of the process and a high-quality end product. There are a variety of different sensor technologies available to check that this pressure is attained. Each technology measures a specific vacuum range with the highest accuracy. In this video, we will show you the principle behind cold cathode technology.
For high and ultra-high vacuum applications between 2·10-3 and 5·10-9 hPa (mbar), cold cathode technology is a good choice. These cost-effective and robust gauges are insensitive to contamination and have good measurement accuracy. To determine pressure, they measure the electrical conductivity of a plasma. A magnetic field causes electrons to move in a spiral formation. When a gas molecule is hit by an electron, a cation is released. This moves to the cathode and generates an electrical signal. The more cations, the higher the current and the higher the pressure.
Busch offers gauges for all 14 decades of vacuum in the VACTEST range. With five different combinable technologies, there is a gauge for every process. Learn more about our range of measurement equipment here:
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