Measurement of level and oil/water interface The OPTIFLEX 4300 C Marine (TDR) offers accurate and reliable level gauging in various applications not fully covered by radars. The instrument signal is guided by a stainless steel wire, reducing the requirement for free space. Where a traditional radar would require a still well for guiding the beam, the OPTIFLEX 4300 C offers an open and easy to clean solution. In slop tanks, the OPTIFLEX 4300 C will even give you the oil/water interface. Measurement of low reflecting cargoes Without the need for a costly still well or fragile float installation, the OPTIFLEX 4300 C offers reliable and accurate level measurements in low reflecting cargoes like LPG.