What are the advantages and Disadvantages of Guided wave radar level transmitter?

Advantages of Guided Wave Radar Level transmitter

Application with density variation,pressure and temperature fluctuation.Long ranges with narrow setting.Interface measurement independent of density

Advantages - 1.Long range 2.Top mounted with narrow measurement beam 3.Low sensitivity to foam and build up 4.Flexible interface measurement with no moving parts.(Simultaneous measurement of interface and total level)

Disadvantages of Guided wave radar transmitter

1.Contacting 2.Corrosion 3.Pulling forces 4.Buildup