Patent ID: 7800528

Claim:
A method for determining filling levels of at least two filling materials in a tank, comprising the steps: providing a pulse generator for generation of electromagnetic pulses; controlling the pulse width of the generated pulses in dependence of at least one dynamic application specific condition; transmitting said pulses with adjusted pulse width from a position above the filling material towards said at least two filling materials; receiving reflected echo pulse signals from the tank; determining the filling levels of the tank based on said received echo pulse signals; wherein one of said at least one dynamic application specific condition(s) is the presence of at least two different interface levels, and wherein controlling of the pulse width of generated pulses in accordance with at least one application specific condition is performed automatically and includes: controlling the pulse width of generated pulses to be first pulse width in order to determine a presence of at least two filling levels of the tank; and controlling the pulse width of generated pulses to be a second pulse width, more narrow than said first pulse width, to distinguish between said different levels.