The 5600 Series uses FMCW technology. The transmitter constantly emits a swept FREQUENCY SIGNAL and the distance is calculated by the difference in frequency between the emitted and received signal at any POINT in time. One advantage with FMCW is that higher accuracy can be achieved. For more general information regarding the principle operation please refer to What is the principle of operation under General Questions. The 5400 Series uses Pulsed, free propagating radar. The level of the liquid is measured by short radar pulses which are transmitted from the antenna at the tank top towards the liquid. When a radar pulse reaches a MEDIA with a different dielectric constant, part of the energy is reflected back to the transmitter. The time difference between the transmitted and the reflected pulse is proportional to the distance, from which the level is calculated.

The 5600 Series uses FMCW technology. The transmitter constantly emits a swept frequency signal and the distance is calculated by the difference in frequency between the emitted and received signal at any point in time. One advantage with FMCW is that higher accuracy can be achieved. For more general information regarding the principle operation please refer to What is the principle of operation under General Questions. The 5400 Series uses Pulsed, free propagating radar. The level of the liquid is measured by short radar pulses which are transmitted from the antenna at the tank top towards the liquid. When a radar pulse reaches a media with a different dielectric constant, part of the energy is reflected back to the transmitter. The time difference between the transmitted and the reflected pulse is proportional to the distance, from which the level is calculated.