What is a Philips Gauge and How Does it Work for Measuring Pressure?

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A Philips Gauge is a type of cold cathode gauge used for measuring low pressures, similar to a Penning gauge. It operates by ionizing gas within a vacuum and measuring the resulting current to determine pressure levels. The discussion highlights its application in high-altitude research, particularly in conjunction with other gauges like bellows and Pirani gauges for a comprehensive pressure measurement range. Users are encouraged to explore additional resources online for more detailed information about Philips Gauges. Understanding these gauges is essential for accurate atmospheric pressure measurement in scientific research.
Lunar_Lander
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Hello,

I have read an interesting paper from the Proceedings of the American Philosophical Society about the use of the V-2 rocket at White Sands, New Mexico for high-altitude research. In it the different gauges for atmospheric pressure measurement were mentioned, as well as the difficulty to cover a pressure range of 108 mmHg.

The article then went on by explaining that the pressure is first measured by a bellows gauge, then by a Pirani gauge. For the lowest pressures either ionization or "Philips" Gauges would be used. I would like to know what a Philips Gauge is, because I did not find information on that on the Internet.

Thank you!
 
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