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The radar level transducer is the non-contact type, while the guided wave radar transmitter is the contact type.
That is to say, in the occasions where the requirement on food grade is high, the guided wave radar transmitter cannot be used.
When using the guided wave radar transmitter, users need to pay more attention to the corrosion and adhesion of the medium, and the installation and maintenance of excessively long guided wave radar are more difficult.
Under the working condition of low permittivity, the measurement principles of both radar and guided wave radar are based on the difference of dielectric constant of the medium. Because the waves emitted by ordinary radar are divergent. When the dielectric constant of the medium is too low, the signal is too weak and the measurement is unstable. However, the guided wave radar transmits the wave along the guided wave rod and the signal is relatively stable. In addition, the common guided wave radar also has the function of bottom detection, which means the signal can be corrected according to the measurement value of bottom echo signal, so that the signal is more stable and accurate.
Ordinary radars can be used interchangeably, while guided wave radar is generally not used interchangeably because the length of the guided wave rod (cable) is fixed according to the original working condition. Therefore, the model selection of guided wave radars is more troublesome than that of ordinary radars.
Guided wave radar should also consider the force condition of the guided wave rod (cable). Generally, the measured distance of guided wave radar is not very long due to the force.
However, guided wave radar has obvious advantages in some special working conditions. For example, there is agitation in the tank and the medium fluctuates greatly. In such conditions, the measured value of guided wave radar with a fixed bottom is more stable than that of ordinary radar.
There is also the material level measurement in the small tank. Because the installation and measurement space is small (or there are lots of interferences in the tank), the general radar is not applicable, then the advantages of guided wave radar will appear.
The radar level transducer has a horn-mouth shape, while the guided wave radar transmitter has a guided wave rod.
Two products with different shapes will naturally be different in some use situations.
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