Working Principle of Radar Level Sensor
Continuous Radar level sensor provides a non-contact continuous level measurement of difficult liquids and solids that cannot be measured with the ultrasonic sensor. Radar level antenna emits narrow microwave pulses that transmitted down by the antenna.
The microwave comes into contact with the measured medium surface then reflected back and received by the antenna system. The signal is transmitted to an electronic circuit and partly convert to level signals (as the microwave featured with high propagation speed, it’s almost instantaneous for the electromagnetic waves to reach the target and return to the receiver)
The level measuring products include 26 GHz high-frequency radar level transmitter, 6.8 GHz intelligent radar level transmitter and guided wave radar level transmitter. These products are widely used in electricity, water, food & beverage, petroleum, petrochemical, coal, chemical, metallurgy industries.
Features of 26 GHz Radar Level Transmitter
- Small antenna size, easy to install; non-contact radar, no wear, no pollution. ·
- Almost free from corrosion, foam impact; hardly affected by the change of the temperature, pressure
and water vapor in the atmosphere. - Severe dust environment is not likely to affect the work of the high-frequency level transmitter
- The shorter wavelength can achieve better reflection for the inclined solid surface.
- The small field angle and energy concentration, enhanced echo capabilities, and beneficial to avoid
interference. - Minimized measuring blind spot can gain the better result of small tank measurement.
- Minimized measuring blind spot can gain the better result of small tank measurement.
- High SNR, even in the case of fluctuations can result in better performance.
- High frequency, the best choice to measure solids and low dielectric media.