Working PrincipleThe radar level gauge is an instrument based on the time-of-flight principle. The radar wave travels at the speed of light, and its time of flight is converted into a level signal by the electronic components. The probe emits high-frequency pulses that travel along the cable. When a pulse hits the material surface, it is reflected back to the receiver inside the instrument, which then converts the distance signal into a level signal.

Measurement Range
H —- Measuring Range
L —- Distance to Empty (Zero Reference)
B —- Top Blind Zone
E —- Minimum Distance from Probe to Tank Wall
The Top Blind Zone refers to the minimum distance required between the highest material level and the measurement reference point.
The Bottom Blind Zone refers to a small section near the very bottom of the cable where accurate measurement is not possible.
The area between the Top Blind Zone and the Bottom Blind Zone is the effective measuring range.
Important Note:Reliable measurement of the material level inside the tank is only guaranteed when the material is located between the Top Blind Zone and the Bottom Blind Zone.