HOME  |  NEWS  |  BLOGS  |  MESSAGES  |  FEATURES  |  VIDEOS  |  WEBINARS  |  INDUSTRIES  |  FOCUS ON FUNDAMENTALS
  |  REGISTER  |  LOGIN  |  HELP
Blogs
Guest Blogs

Establishing Pressure Sensor Selection Criteria

NO RATINGS
1 saves
< Previous Page 2 / 2
View Comments: Newest First|Oldest First|Threaded View
William K.
User Rank
Platinum
Sensor selection criteria
William K.   12/21/2012 8:39:07 PM
NO RATINGS
When I was designing industrial tsting and calibration systems the two main criteria were stability and ruggedness. Because of the types of testing the machines did, the readings only needed to be accurate at the points of interest, often at a single point. So the transducer had to hold calibration for that particular pressure point, and be veryy stable. Calibrations were normally done quarterly, at least that was the target, and by selecting the right sensors we would normally only need a very small correction on a yearly basis. So it was far cheaper to spend more on a stable transducer that wound up only needing to be checked on a yearly basis. That stability won my argument for purchasing the more expensive device. Mechanical durability and freedom from mechanical aging, (diaphram work hardening), and electronic stability, wound up being the two primary parameters in our selection process, because that was what mattered to our customers.

The customer may not always be right, but they are always the ones with the money.

ajdashsmith
User Rank
Iron
Re: Ruggedized sensors
ajdashsmith   11/30/2012 10:44:07 AM
NO RATINGS
For the most extreme situation I think that is the case, but for markets and applications that are large enough, they drive standard solutions even if those are ruggedized solutions.  One other thing that has become important is that to have the flexibility and scale to create a particular solution, it is much more efficient to have a standard product platform that the sensor supplier then takes and implements a ruggedized solution on top of the standard product.  Much faster and more efficient than developing the entire sensor from scratch.  This is how we have positioned our standard product platforms at Honeywell to address individual customer needs for ruggedized sensors.
- AJ Smith

Rob Spiegel
User Rank
Blogger
Re: Ruggedized sensors
Rob Spiegel   11/30/2012 10:08:49 AM
NO RATINGS
AJ, that makes sense. I would guess that the days of using off-the-shelf components are gone for many of these devices.

ajdashsmith
User Rank
Iron
Re: Ruggedized sensors
ajdashsmith   11/30/2012 8:22:56 AM
NO RATINGS
That can be the case, Rob, and increases as the sensor becomes more specialized.  When it comes to doing something completely custom there are often times development agreements and engineering costs involved beyond just the cost of the sensor as well.
 - AJ Smith

Rob Spiegel
User Rank
Blogger
Re: Ruggedized sensors
Rob Spiegel   11/29/2012 11:22:07 PM
NO RATINGS
AJ, I would imagine the ruggedized sensors would come with some significant cost consequences. 

ajdashsmith
User Rank
Iron
Re: Ruggedized sensors
ajdashsmith   11/28/2012 11:03:21 PM
NO RATINGS
Rob, What I see is that environmental resilience is much like other performance factors in that the more stringent the requirement (in this case the more extreme the environmental factor(s) the fewer options there are to choose from. And in some cases for really extreme environments the design engineer may need to work with a supplier to develop a product that can meet their particular requirements.
- AJ Smith

Nancy Golden
User Rank
Platinum
Good General Principles
Nancy Golden   11/28/2012 4:00:46 PM
NO RATINGS
Nice article A.J. - I appreciated your very straightforward explanation of pressure sensor selection. I can also see how your criteria can be easily adapted to selecting any sensor by using your general principles coupled with sensor specific criteria. It's so important for the design engineer to understand all of the variables involved when making a selection!

Rob Spiegel
User Rank
Blogger
Ruggedized sensors
Rob Spiegel   11/28/2012 2:01:24 PM
NO RATINGS
AJ, On your last point about finding sensors that can function in difficult environment, do design engineers have sufficient choices that can work under environmental stress?

Partner Zone
More Blogs from Guest Blogs
It seems that gears have been around forever -- what could be new?
The use of ZNE technology buildings not only reduces cost and creates renewable energy, but it can give a boost to the economy. The implementation and execution will require a workforce, which means the result can be increased employment.
The use of CFD is more profound in automobile design because of the diverse physics involved. It can be used to optimize components for downsizing and reducing the environmental footprint while maintaining or improving operational efficiency.
A Detroit automaker was struggling with a semi-manual, labor-intensive parts receiving process. Workers had enter parts into a spreadsheet manually at a stationary workstation. This stopped the receiving process dead in its tracks. A better system was needed.
Pressure sensors can be used in a wide range of applications. It’s imperative that they’re suited for use in hazardous situations and are fully compliant with one of several protection standards.
Design News Webinar Series
7/17/2014 11:00 a.m. California / 2:00 p.m. New York
6/25/2014 11:00 a.m. California / 2:00 p.m. New York
5/13/2014 10:00 a.m. California / 1:00 p.m. New York / 6:00 p.m. London
7/23/2014 11:00 a.m. California / 2:00 p.m. New York
Quick Poll
The Continuing Education Center offers engineers an entirely new way to get the education they need to formulate next-generation solutions.
Jul 21 - 25, Design Products With Bluetooth Low Energy
SEMESTERS: 1  |  2  |  3  |  4  |  5  |  6


Focus on Fundamentals consists of 45-minute on-line classes that cover a host of technologies. You learn without leaving the comfort of your desk. All classes are taught by subject-matter experts and all are archived. So if you can't attend live, attend at your convenience.
Next Class: August 12 - 14
Sponsored by igus
Learn More   |   Login   |   Archived Classes
Twitter Feed
Design News Twitter Feed
Like Us on Facebook

Sponsored Content

Technology Marketplace

Copyright © 2014 UBM Canon, A UBM company, All rights reserved. Privacy Policy | Terms of Service