Every month, Control's editors take a specific product area, collect all the latest, significant tools we can find, and present them here to make your job easier. If you know of any tools and resources we didn't include, send them to firstname.lastname@example.org, and we'll add them to the website.
SELECTING A PRESSURE TRANSDUCER
This free, downloadable white paper discusses the top five selection considerations and the top three design considerations for selecting the correct pressure transducer for your industrial applications. To get the white paper, go to http://tinyurl.com/al96eyu. Setra Systems Inc.
American Sensor Technologies Inc. (AST) has released a new blog for pressure instrumentation and related items. AST hopes to keep customers up to date with the latest product updates, inform visitors of new developments within the sensor industry, and educate the marketplace on how sensors are being used and applied. AST has begun posting to the blog with topics ranging for oxygen pressure transducers to eliminating diaphragm seals. The direct link to the blog is at www.astsensors.com/blog/.
This free tutorial from the NI Developer Zone series covers the basics of pressure measurement. Topics covered include what pressure is, pressure sensors, pressure measurement, and signal conditioning used to measure pressure. The tutorial includes basic equations, drawings and references for further study. The direct link is at www.ni.com/white-paper/3639/en.
The Open Book Project offers a free, downloadable, 655-page PDF, "Lessons in Industrial Instrumentation," by Tony R. Kuphaldt, c. 2008. Pages 289-347 of this book cover pressure instrumentation, including continuous pressure measurement, mechanical and electrical pressure elements, force-balance and differential pressure transmitters, and pressure sensor accessories. The direct link to the book is at http://openbookproject.net/books/socratic/sinst/book/liii_0v2.pdf.
This handbook from Ametek covers the basics of pressure measurement, including deadweight pressure testers, the calibration of deadweight testers, monometers, secondary comparison pressure standards and selection of pressure measurement standards. The PDF is free and downloadable, but registration is required. The direct link is at
One of our readers asked our team of experts, "I need your help in installation of a pressure transmitter for dusty service. We're working on blast furnace stack pressure measurement. It's full of dusty particles. We suggest a scheme, wherein we are purging the impulse tube constantly with low-pressure nitrogen, and also blasting nitrogen at regular intervals using solenoid valves. Please suggest any alternate option or your opinion on the same." Read the answers at http://tinyurl.com/bc3olqq
I/P transducers are versatile instruments that use an electrical control signal to proportionally regulate gas pressure. The most common application is in valve actuation, but they can also be used in many other situations. As more processes become automated, I/Ps are being used more and more in place of manual regulators. Overall, I/Ps are relatively simple devices, but there are numerous factors to take into account before selecting one. This eight-page white paper should provide you with a complete understanding of the factors involved in making the correct product selection, installation and maintenance. When chosen, installed and maintained correctly, I/Ps should provide many years of reliable service. The PDF is free and downloadable, but registration is required. The direct link is at http://tinyurl.com/b34rbcn.