Frequency modulated radar level gauge

The frequency modulated radar level gauge, also known as Frequency Modulated Continuous Wave (FMCW) radar level gauge, is a high-precision liquid level measurement device.

Continuous microwave pulses with frequency modulation are emitted through the antenna system. These pulses are reflected when they encounter the surface of the medium and are received by the same antenna. The received signal is processed through amplification, mixing, etc., to obtain a difference frequency signal that is proportional to the frequency difference between the transmitted and received signals. This frequency difference is proportional to the propagation time of the microwave pulse in the medium. By measuring the frequency of the difference frequency signal and combining it with the speed of light, the propagation distance of the microwave pulse in the medium can be calculated. Then, based on the geometric shape and size of the storage tank or container, the propagation distance is converted into the liquid level height.

Product Parameters

• High Precision: Utilizing continuous frequency modulation technology, it offers high measurement accuracy with an error as low as ±1mm, making it suitable for industrial processes with high requirements for liquid level measurement accuracy.
• High Reliability: The non-contact measurement method is not affected by the properties of the medium, such as viscosity and corrosiveness. Moreover, there are no moving parts inside, minimizing mechanical failures and ensuring stable and reliable performance even in complex working conditions.
• Wide Applicability: It is suitable for liquid level measurement in various storage tanks, troughs, or containers, and can measure liquids of various properties, including corrosive and viscous liquids. It is widely used in multiple industries such as petrochemicals, food processing, and water treatment.
• Easy Installation and Maintenance: Installation is relatively simple, requiring only the installation of the antenna system on the top or side of the storage tank or container. Maintenance is minimal, typically involving only regular checks of the antenna system's cleanliness and the tightness of the connection lines.
• Withstand pressure up to 64bar, and the medium temperature range is from -60℃ to +600℃. Supports communication protocols such as HART/Profibus PA.

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