Both radar technologies deliver outstanding results and are suited for use in specific applications, but it’s clear that 80 GHz technology is a huge step forward in liquid level measurement and process control.
Non-contact 80 GHz radar sensors present an alternative to guided wave instruments in some applications. In applications with lots of buildup, where mounting on a valve is necessary, and with internal obstructions, non-contact radar is often a more appropriate choice. Guided wave radar, however, is a viable technology that has its place. GWR is an excellent solution for measuring low-dK products, and level inside stilling wells, bridles, and chambers.
The process instrumentation world is large enough for both types of radar sensors; there are plenty of liquid level applications to go around. Operators should be careful to work with suppliers who will take their individual circumstances into consideration when recommending a level measurement technology.