Tag Archives: MEMS pressure sensor

The Pressure in an Iron Lung

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.

The Pressure in an Iron Lung

Before today’s respirators, patients with several breathing problems relied on a machine called an iron lung. Unlike the modern respirators that use positive pressure (greater than 1 atmosphere) that force air into the lungs, the iron lung was a negative pressure ventilator. The machine surrounded the person and the sealed cavity’s pressure was reduced to induce inhalation by the patient and then the pressure was increased to 1 atmosphere (15 psi or 750 mmHg). While all but obsolete today, these types of machines were extensively used when patients with polio were treated because of loss of muscle control that extended to their ability to breath. Thankfully, Dr. Jonas Salk discovered a vaccine to prevent polio (in 1953) and subsequent vaccines have eliminated polio as a health problem and today positive respirators using microelectromechanical systems (MEMS) pressure sensors can be so small that they are portable.

Iron Lung

The pressure gauge in this iron lung has been replace in modern respirators by MEMS pressure sensors. Source: Pittsburgh Post-Gazette website.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com

Large Pressure Drop Indicates a Bomb Cyclone

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.

Large Pressure Drop Indicates a Bomb Cyclone

One of the first weather oddities to hit the United States in 2018 was the bomb cyclone, or bombogenesis, as meteorologists call it. This type of winter storm with unusually low temperatures is indicated by a low pressure drop of at least 24 millibars (0.35 psi) in 24 hours. With normal pressures around 1000 millibars (14.7 psia) near sea level, this represents a 2.3% change from the normal reading.

In this year’s bomb cyclone, the pressure dropped by 54 millibars in 24 hours, more than twice the standard criteria, indicating a very strong storm. In fact, it was considered one of the greatest rapidly deepening rates ever observed by the National Weather Service.

With the continuous resolution capabilities of microelectromechanical (MEMS) pressure sensors, even the change of a few millibars can be easily observed with an absolute pressure sensor.

NOAA GOES-16 Weather Satellite

The 2018 bomb cyclone as observed from the GOES-16 weather satellite, which is operated by the National Oceanic and Atmospheric Administration.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com

The Value of Pressure

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.

The Value of Pressure

Pressure makes diamonds” ― George S. Patton Jr.

While Patton was referring to the stress that can transition those who survive it into better individuals, carbon subjected to intense pressure and heat for millions of years turns into diamonds. In fact, the right combination of heat, pressure and time can crystallize many other minerals.

For natural diamonds, the pressure results from their formation at depths of 140 to 190 kilometers (87 to 118 mi) in the Earth’s mantle – below the Earth’s crust.

The Hope Diamond

The Hope Diamond

When Tracy Hall achieved the first commercially successful synthesis of diamond in 1954, a more specific pressure value was identified. Hall used a “belt” press, which was capable of producing pressures above 10 GPa (1,500,000 psi) and temperatures above 2,000 °C (3,630 °F).

Pressure is essential in creating diamonds and other precious gems, but its greatest value is in healthcare. Without your health, everything else means nothing. Blood pressure, respiratory flow, interocular pressure and other pressure measurements indicate good health or a health problem. Cost-effective microelectromechanical (MEMS) pressure sensors provide value by confirming good health or helping diagnose problems to correct them and restore good health.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com

Progression of MEMS Pressure Sensing

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.

At Sensors Expo 2017, Jim Brownell, one of All Sensors’ sales managers, explained the progression of microelectromechanical system (MEMS) pressure sensing over the past 30+ years from All Sensors’ perspective.

Check out that interview here, courtesy of EE World Online’s Sensor Tips.

 

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at info@allsensors.com