Tag Archives: air pressure

The Pressure in Bubble Packs

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 Bubble Packs

Sort of a pre-inflated airbag system for fragile or even not so fragile products, Bubble Wrap® protects numerous shipments from in-transit and rough handling damage caused by shock, vibration or abrasion. These modern-day marvels are an array of small (¼-inch diameter) to rather large (1-inch diameter) air pockets sealed between two thin plastic layers.

Over 60 years ago, the inventors created bubble wrap by laminating two plastic sheets with air bubbles in between. Today, the company they founded, Sealed Air Corporation, provides several types of bubble wrap products for food handling, medical, electronics and other applications. Many of the products have unique properties for a specific application, such as anti-static material for electronics packaging.

The air pocket is created by a pressure of only a few psi above atmospheric pressure. However, with sufficient external pressure applied, the bubbles will pop, providing stress relief for an untold number of users.

Sealed Air Corporation Bubble Pack

Source: Sealed Air Corporation https://sealedair.com/

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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 Pressure in Hyperbaric Chamber Healing

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 Hyperbaric Chamber Healing

In Hyperbaric Oxygen Therapy (HBOT), a patient breathes 100% oxygen intermittently while inside a treatment chamber maintained at a pressure higher than sea level pressure (>1 atmosphere absolute). The patient inhales the oxygen within the chamber, where the pressurization could be 1.4 atmosphere absolute or higher.

HBOT can be a primary treatment or used to supplement surgical or pharmacologic approaches to healing. Specific medical uses include:

  1. Air or gas embolism
  2. Carbon monoxide poisoning
  3. Gas gangrene
  4. Crush Injuries, compartment syndrome (excessive pressure inside an enclosed muscle space in the body) and other acute traumatic ischemias (inadequate supply of blood to organs and body tissues)
  5. Decompression sickness
  6. Inadequate blood flow in arteries
  7. Severe anemia
  8. Intracranial abscess
  9. Dermatological disorders, such as Necrotizing Soft Tissue Infections
  10. Compromised grafts and flaps
  11. Acute thermal burn injury
  12. Sudden deafness

 

Hyperbaric Oxygen Therapy (HBOT)Hyperbaric Oxygen Chamber (HBOT)

Effective HBOT treatment involves controlling three parameters: %O2, pressure, and time. While, mechanical analog gauges are the standard method for measuring pressure in commercially available hyperbaric chambers and are typically accurate only to within ±2% of full scale, digital pressure gauges with considerably greater accuracy and remote monitoring and control capability are being considered. A recent patent for a hyperbaric chamber suction system, including hyperbaric oxygen chamber, proposes the use of two electrically connected digital pressure gauges with an externally connected digital display as well as electrical solenoid valves and a programmable logic controller (PLC) to maintain desired pressure levels.

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

Sensing Pressure in Washing Machines

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 be discussing the pressure in washing machines.

Sensing Pressure in Washing Machines

Initially, timing was used to estimate the amount of water for various washing machine cleaning cycles. Today, many manufacturers sense the pressure developed in an air dome that is referenced to the water level and provides a much more accurate measurement. The air pressure level is measured either by a pressure switch or a pressure sensor with air providing isolation from the long term effects of operating a diaphragm in direct contact with water and other contamination.

The pressure switch can close and/or open contacts to provide an input to other circuitry. In contrast, the pressure sensor can provide either an analog or digital output to the washing machine control unit. Since the pressure sensor’s output directly results in a power control function such activating a pump or motor, in some manufacturers products, the pressure sensor is mounted in a Power Control and Pressure Sensing Module. The water level in most washing machines is well below 2 feet (0.87 psi), so a pressure sensor that can measure 1 psi would work in this application.

2016-10-12_21-28-14

Air pressure is sensed to measure water level in washing machines. Source: http://removeandreplace.com/wp-content/uploads/2013/12/washer-overfill.jpg

 What do you think/Comments?
Do you have a pressure sensing question? Let me know and I’ll address it in an upcoming blog.
– Han Mai, Senior Marketing Specialist, All Sensors Corporation (hmai@allsensors.com)