The Pressures of Daily Life on Earth

Welcome to All Sensors “Put the Pressure on Us” blog. This blog brings out pressure sensor aspects in a variety of applications inspired by headlines, consumer and industry requirements, market research, government activities and you. In this blog we’ll discuss pressures at sea level.

The Pressures of Daily Life on Earth

To get away from the usual routine and day to day stress, it’s great to take a summer vacation. Many people, even those in the center of the country, like to go on a seaside vacation near an ocean. For those concerned about pressure, at sea level the barometric pressure is 1 atmosphere (14.7 psi, 101 kPa, 29.9 in. Hg, or 760 mm Hg).

Surprisingly, the pressure at sea level is higher than most places on earth. At the top of Mt. Everest (altitude 29,029 feet or 8,848 m), the highest elevation in the world, the summit pressure of 251–253 Torr (33.5 to 33.7 kPa or 4.84 to 4.89 psi) is about 1/3rd of sea level based on measurements made from May to October. (For altitude pressure calculations, click here.) While the pressure is considerably less than sea level or anywhere else on earth, in spite of the exhilaration of being on top of the world, the stress level has to be incredibly high.

In contrast, the Mariana trench at the bottom of the ocean in the western Pacific Ocean is 35,814 feet (or 10.9 km) below sea level and the pressure is about 1.1 × 108 Pa (16,000 psi) or over  1000 atmospheres. That is serious pressure and only three human beings have made the trip. (For under water pressure calculations, click here.)

Compared to the extreme alternatives, a sea side vacation seems like a reasonable way to escape the pressures of daily life.

What do you think/Comments?
Do you have a pressure sensing question? Let me know and I’ll address it in an upcoming blog.
-Dan DeFalco, Marketing Manager, All Sensors Corporation (