80G FM Radar Level Meter

Measuring principle
A radar signal is emitted via an antenna, reflected from the product surface and received after a time t. The radar principle used is FMCW (Frequency Modulated Continuous Wave).
The FMCW-radar transmits a high frequency signal whose frequency increases linearly during the measurement phase (called the frequency sweep). The signal is emitted, reflected on the measuring surface and received with a time delay, t. Delay time, t=2d/c, where d is the distance to the product surface and c is the speed of light in the gas above the product.
For further signal processing the difference Δf is calculated from the actual transmitted frequency and the received frequency. The difference is directly proportional to the distance.
A large frequency difference corresponds to a large distance and vice versa. The frequency difference Δf is transformed via a Fast Fourier Transform (FFT) into a frequency spectrum and then the distance is calculated from the spectrum. The level results from the difference between the tank height and the measured distance.

1. Transmitter
2. Mixer
3. Antenna
4. Distance to product surface, where change in frequency is proportional to distance
5. Differential time delay, Δt
6. Differential frequency, Δf
7. Frequency transmitted
8. Frequency received
9. Frequency
10. Time

The main advantages of KLD103 series FM radar level meter are as follows:

• Based on the self-developed CMOS millimeter-wave radio frequency chip, it realizes a more compact radio frequency structure, a higher signal-to-noise ratio, and a smaller dead zone.
• The 5GHz operating bandwidth enables the product to have higher measurement resolution and measurement accuracy.
• The narrowest 3° antenna beam angle, the interference in the installation environment has less impact on the instrument, and the installation is more convenient.
• Shorter wavelengths and better reflection properties on solid surfaces.
• Support remote debugging and remote upgrade, reduce waiting time and improve work efficiency.
• Support mobile phone Bluetooth debugging, convenient for on-site personnel maintenance work.

Technical parameter

Product Size (unit: mm)

Field application