A level sender for a tank includes a sensor device. The sensor device includes a primary pressure sensor, a reference pressure sensor, and a correction pressure sensor. A primary tube at least partially encloses the primary pressure sensor and extends from an upper region of the tank to a lower region of the tank. A reference tube at least partially encloses the reference pressure sensor and extends from the upper region to the lower region. A correction tube at least partially encloses the correction pressure sensor. The correction tube at least partially enclose the correction pressure sensor in the upper region. The sensor device further includes a processor coupled to the primary, reference, and correction pressure sensors to determine a level of liquid within the tank based on pressure measurements within the primary, reference, and correction tubes.