Radar level gauge uses the principle of echo ranging, and its horn-shaped or rod-shaped antenna emits microwave to the measured material surface. When the microwave propagates to the material surface with different relative dielectric rates, it will reflect and be received by the antenna. The time difference between transmitting wave and receiving wave is proportional to the distance between material surface and antenna, and the distance can be known by measuring the propagation time.
The antenna is small in size and easy to install;
Non-contact radar, no wear and pollution;
It is little affected by corrosion and foam;
It is less affected by the changes of dust, water vapor, temperature and pressure in the atmosphere;
Shorter wavelength and better reflection on inclined solid surface;
The beam angle is small and the energy is concentrated, which enhances the echo ability and is beneficial to avoid interference objects;
The blind area of measurement is smaller, and good results will be achieved for small tank measurement;
High signal-to-noise ratio, which can achieve the specified performance even in the case of fluctuation;
The high emission frequency of 26GHz is suitable for measuring solids and low dielectric constant media.