A Pressure Shortage?

 

A Pressure Shortage?

In 2021, a shortage of semiconductors impacted automotive companies’ production, smartphone new product introductions, and more. Also, the Colonial pipeline hack created a fuel shortage for the U.S. southeastern states. While the new outbreak of COVID-19 in India has received global attention since it has reported more than 300,000 daily infections for 22 consecutive days, what is less well known is that the outbreak has caused a shortage in oxygen (O2) concentrators.

For those COVID patients who do not require intensive care, oxygen concentrators deliver about five to 10 liters of oxygen per minute, typically at about 93% purity.  Unlike tanks or other containers supplying oxygen, concentrators use electrical pumps to provide a continuous supply of oxygen by removing the nitrogen from the surrounding air. To monitor the process and safely supply air to the patient, an oxygen concentrator uses differential pressure sensors for flow measurements and gauge pressure sensors for sensing pressure at different points in the process. The low differential pressure measurements for flow are typically only a few kPA. For those addressing the oxygen concentrator shortage, essentially any of All Sensors DLHR, DLVR, ELV, ELVR, MAMP, and MLV series products that have respiratory applications will work in these low pressure applications.

Classic Pressure Swing Adsorption (PSA) Oxygen Concentrator Diagram

Classic pressure swing adsorption (PSA) oxygen concentrators use two-bed molecular sieves.

Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at [email protected]

The Pressure for Ventilators

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 for Ventilators

In addition to the pressure to get more ventilators, pressure is an integral part of a ventilator’s operation. Breathing involves inspiratory (inhaling) pressure and expiratory (exhaling) pressure and a ventilator has to take the user’s values into account. Peak Inspiratory Pressure or PIP is the maximum pressure inside the lungs during each inhaled breath and the normal range is 25-30 cm H2O. Positive End Expiratory Pressure or PEEP is the amount of pressure left inside the lungs at the end of a breath to keep the alveoli, tiny air sacs of the lungs, open. The normal range is 3-5 cm H2O.

The pressure inside a patient’s lungs depends on the compliance of their lungs. While the suggested range of pressures during ventilation is 20-35 cm H2O with an absolute maximum of 40 cm H2O, someone with damaged lungs may need a higher pressure.

 

Airway pressure and flow waveforms during constant flow volume control ventilation show PEEP and PIP

Airway pressure and flow waveforms during constant flow volume control ventilation show PEEP and PIP.
Source: http://rc.rcjournal.com/content/59/11/1773/tab-figures-data

With pressures below 50 cm H2O (19.7 in H2O or 4,903 Pa) for dynamic measurements, a pressure sensor designed specifically for these low pressures, such as All Sensors’ DLC, DLLR, and others, provide the required accuracy.

Comments/Questions?
Do you have a pressure sensing question? Let us know and we’ll address it in an upcoming blog.
Email us at [email protected]

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 [email protected]