Mechanical Pressure Measuring devices — Lesson 2

This lesson covers the principles and techniques of pressure measurement, focusing on U-tube manometer and inclined well type manometer. It explains the operational principles of these devices, their advantages, limitations, and potential sources of error. The lesson also discusses how these instruments operate on the principle that a pressure difference will support a column of liquid. It further elaborates on how to measure pressure using these devices, the importance of accurate height measurement, and the challenges in measuring low and high pressures. The lesson concludes with a brief introduction to other techniques for measuring low pressure.

Video Highlights

01:06 - Discussion on U-tube manometer
03:48 - How to measure pressure using U-tube manometer
16:24 - Limitations of U-tube manometer
24:32 - Introduction to inclined well type manometer
25:27- How to measure pressure using inclined well type manometer
37:19 - Advantages of inclined well type manometer

Key Takeaways

- U-tube manometer and inclined well type manometer are common devices used for pressure measurement.
- These instruments operate on the principle that a pressure difference will support a column of liquid.
- Accurate height measurement is crucial in pressure measurement as it directly affects the accuracy of the results.
- U-tube manometer has limitations in measuring very low and very high pressures.
- Inclined well type manometer, with its ability to measure changes in length of the liquid column, can accurately measure low pressures.