Radar technology has revolutionized level measurement in a variety of process industries since the introduction of 4-20mA loop powered, radar-based transmitters in the 1990s. Both guided wave radar (GWR) and non-contact radar have numerous advantages over older, more established level measurement technologies. In a recent article for Industrial Products Process and Technology Magazine (IPP&T), Magnetrol® Global Product Manager Bob Botwinski discusses the benefits of using these radar technologies versus traditional level instrumentation, and how guided wave radar and non-contact radar can work together to provide reliable level measurement. Here’s an excerpt from the article:
Both guided wave radar and non-contact radar have the same general principle of operation (microwave time of flight) and no moving parts. Because of this, users can retrofit these radar transmitters into various process applications and see improvement in efficiency and accuracy, including applications that use these technologies:
- DPs, due to SG shifts, installation cost, and leak points
- Buoyancy, due to SG shifts, moving parts, calibration issues, and cost
- RF Capacitance, due to cumbersome calibration, dielectric shifts, and coating issues
- Ultrasonics, due to vapor effects, turbulence, and foam
Guided wave radar and non-contact radar are related technologies, and together they are a powerful combination that can cover the majority of your continuous level control needs. A very similar user interface and quick disconnect electronics means that, if you know how to use one, you’ll know how to use the other.
The IPP&T article contains an overview of the two technologies, the best applications for each technology and information about what to look for when selecting a radar-based device. In addition, MAGNETROL has created a radar solutions site with more information on both guided wave radar and non-contact radar level control technologies.