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What is Beam Angle of a Radar Level Transmitter

Apr 07 , 2024

Radar level transmitters are vital devices used in various industries for measurement of liquid or solids level, and known for their high accuracy and great performance in harsh environment. One of the critical parameters in radar design and operation is the beam angle.

What is Beam Angle of a Radar Level Transmitter?

Beam angle refers to the angle of the radar signal emitted from the antenna of the radar level sensor. It determines the coverage area or the region of space that the radar signal can effectively detect. A wider beam angle means a broader coverage area, while a narrower beam angle results in a more focused detection area.

What is Beam Angle of a Radar Level Transmitter

What Affects Beam Angle?

Several factors determine the beam angle of radar level transmitters. The antenna design, frequency of the radar signal, and the physical properties of the measured medium all play crucial roles. Generally speaking, the higher frequencies, the narrower beam angles, whereas lower frequencies result in wider beam angles. Antenna design also impacts beam angle, with parabolic antennas typically offering narrower beam angles compared to horn antennas. Besides, the wider range of a radar sensor, the larger beam angle.

The choice of beam angle is essential in sensor selection as it directly affects the performance and accuracy of level measurement. A narrower beam angle is suitable for applications where precise level measurement is required in confined spaces or tanks with internal obstacles. On the other hand, a wider beam angle is preferable for large tanks or vessels with irregular shapes where a broader coverage area is needed.

It’s crucial to consider the specific requirements of the application, such as tank size, shape, and the nature of the measured medium, when selecting a radar level transmitter with the appropriate beam angle. Additionally, factors like signal strength, signal-to-noise ratio, and interference from surrounding objects should also be taken into account to ensure reliable and accurate level measurement.

What is Beam Angle of a Radar Level Transmitter


Understanding the beam angle of radar level transmitters is essential for ensuring optimal performance and accuracy in liquid level measurement applications. By considering factors like antenna size, frequency, and application requirements, we can select the right sensor with the appropriate beam angle to meet their specific needs.

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