What Devices are Used to Measure Deep Vacuum Ranges?

Which of the following devices are used to accurately measure a deep vacuum (29.25Hg down to 29.92Hg)?

A) Compound gauge

B) Pressure gauge

C) Bourdon Tube

D) Electronic high vacuum tube

Answer:

Option D - Electronic high vacuum tube

To accurately measure deep vacuum ranges, electronic high vacuum tubes and compound gauges are typically used. The mercury barometer and manometer are used for measuring atmospheric pressure and gauge pressure levels, not deep vacuum ranges.

The devices used to accurately measure deep vacuum ranges (29.25Hg down to 29.92Hg) include Electronic high vacuum tubes and Compound gauges. An electronic high vacuum tube like an ionization gauge is highly sensitive and measures the pressure of gases in an enclosed system through ionization. On the other hand, a compound gauge can measure both positive and negative pressures, making it suitable for measuring vacuum levels.

The bourdon tube, while able to measure pressure, is not designed for accurately measuring deep vacuum levels. It is essential to choose the right device based on your specific application to ensure accurate pressure measurements within the defined ranges.

Understanding the differences between these devices and their unique capabilities is crucial in selecting the appropriate equipment for measuring pressure accurately.