Radar checklist blog
This entry on the Control Talk blog, "Checklist for best radar level measurement performance" by Greg McMillan, covers 34 major application details that need to be addressed in order to implement non-contacting and guided-wave radar for level measurement. It's based on articles in Chemical Processing and Control magazines, and there are references provided for them.
Two videos: Radar and antenna
The first of these two videos, "Choosing the right radar antenna for level applications" by Mike DeLacluyse of Lesman and Mark Klee of Siemens, shows how to pick the most appropriate antenna model and configuration for radar level measurement. The second, "Non-contact, through-air radar level measurement for hygienic applications" by Tim Bulbuk of Siemens, covers special concerns of measurements in hygienic applications, sanitary approvals and their implications, cleanability and maintenance, and best practices for optimal measurement performance.
Two basics 101 whitepapers
These two whitepapers, "Liquid level measurement—basics 101," Part 1 and Part 2, by John Schnake of Endress+Hauser cover hydrostatic devices, open and closed tanks, radar and guided wave radar, capacitance, and radiometric (gamma) technology.
Laser level compendium
This sub-website, "Laser instruments and instrumentation" at the ICEweb website includes basic concept explanations and links to several instructive articles, including how lasers came to be used for level measurement and application considerations.
Radar level manual
This 48-page manual, "Radar level transmitters" by the staff at Festo Didactic, includes a wealth of informative details on radar level technologies and methods, such as radar sensors, antennas, guided transmitters, installation issues, configuration and commissioning.
Magnetic technology options
This 16-page brochure, "Magnetic level technologies" from Orion Instruments covers all the classic methods, including visual indicators, floats, switches, chamber and tank construction, mechanical/electronic solutions, and support accessories.
Continuous level blog post
This blog entry, "Basics of continuous level measurement" by Gene Henry, senior level business manager at Endress+Hauser, covers all the classic level methods and basic technologies, such as ultrasonic, free space radar, guided wave radar, capacitance, gamma and pressure, and includes some quality graphics.
Guided wave website
This multi-faceted website, "About guided wave radar" by Emerson includes a technology overview and "how it works" technology explanations on handling process variations, and knowing the interface, as well as a short "why media matters" video. The site also includes three case studies from end users.
Do ultrasonic right
This feature article, "Understanding how ultrasonic continuous level measurement works" by former Control editor in chief Walt Boyes, reports that ultrasonic level is one of the five non-contacting continuous level measurement technologies and the one that is most often misused or misapplied, and demonstrates how to do it right.