Radar level gauge system and method for reduced lower dead zone

A method of determining a level of a product in a tank, using a radar level gauge system comprising:

• a transceiver;
• a probe arranged to extend towards and into the product from a first probe end coupled to the transceiver to a second probe end, the probe comprising a first probe conductor and a second probe conductor being conductively coupled to each other by a probe termination arrangement at the second probe end;
• and
• processing circuitry,
• the method comprising the steps of:
• generating and transmitting, by the transceiver, an electromagnetic transmit signal;
• guiding, by the probe, the transmit signal towards and into the product;
• returning, by the probe, an electromagnetic reflection signal resulting from reflection of the transmit signal at the surface of the product and at the second probe end;
• receiving, by the transceiver, the reflection signal;
• determining, based on the reflection signal and a timing relation between the reflection signal and the transmit signal, an echo signal exhibiting an echo signal strength as a function of a propagation parameter indicative of position along the probe;
• and
• determining, by the processing circuitry, the level of the surface of the product based on a propagation parameter value indicative of a first threshold position along the probe for which the echo signal has reached a predetermined threshold signal strength, and an offset indicative of an offset distance along the probe from the first threshold position towards the second probe end.