Pressure and Gas Chromatography

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.

Pressure and Gas Chromatography

Gas chromatography uses stationary and mobile phases for separating and analyzing mixtures according to “Chromatography Composition Measurement,” in The Measurement, Instrumentation, and Sensors Handbook. To perform the necessary steps, the typical gas chromatograph has several different aspects. It starts with a pressure regulated carrier gas supply. The carrier gas pressures are typically 34 to 69 kPa (5 to 10 psig) to 138 to 340 kPa (20 to 50 psig) at gas flow rates of 1 mL min-1 or less. If the data system monitors and records the supplied pressures, pressure sensors would also be used.

To measure this range of pressures, All Sensors SPM 401 Series of media isolated sensors would provide a good solution since process control and monitoring systems are target applications.

Gas Chromatograph

The components of a gas chromatograph include regulating gas pressure.  Source: http://faculty.uml.edu/david_ryan/84.314/Instrumental%20Lecture%2016.pdf

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

Media Isolated Pressure Sensors

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 media isolated pressure sensors.

Media Isolated Pressure Sensors

Unlike many other sensor applications, pressure sensors frequently have to contact some pretty nasty chemicals. Sensor manufacturers usually qualify their sensors for restricted usage with statements such as “intended for use with non-corrosive, non-ionic working fluids such as air, dry gases, etc.” This means that the user who has an application that does not meet these criteria, either cannot use a product that meets all the other application requirements or has to take steps to protect the sensor and assume any risk regarding the protection methodology.

In contrast, sensors designed specifically for harsh environments open many new applications in areas including medical, environmental controls, plant and mechanical engineering as well as automotive. In many cases, the technology changes for these more rugged sensors from a silicon, microelectromechanical system (MEMS) material to a ceramic material but still retains a monolithic design. A flush membrane makes it easy to interface these types of pressure sensors to hydraulic fluids and even extends the pressure range up to 6000 PSI. With the CPM 602 series, All Sensors now participates in these more demanding applications.

CPM 602

A ceramic pressure sensor overcomes many of the limitations of silicon-based MEMS pressure sensors.

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)

NEW Media Isolated Millivolt Pressure Sensors

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 our new media isolated pressure sensors.

NEW Media Isolated Millivolt Pressure Sensors

All Sensors has a brand new offering of media isolated pressure sensors. The first line released is the ceramic CPM 602 Series. These new pressure sensors offer design engineers excellent performance in various applications, especially for low-cost solutions.

Product Features

  • Pressure ranges 30 to 6000 psi gauge
  • Piezoresistive monolithic
  • Excellent chemical resistance
  • Supply voltage 2 to 30 VDC
  • Total error better 4% FS

Applications

  • Medical
  • Environmental Controls
  • Plant and Mechanical Engineering
  • Automotive

See more information here. Datasheet download here.

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)