Measuring device for the effects of a boundary layer between the oil and water in a tank or the like.

摘要

Measuring apparatus for determination of the level of a boundary layer between oil and water in a tank, comprising electrical sensing units distributed vertically in the tank and adapted to be responsive to the liquid and to deliver measuring signals to electrical measuring circuits with associated display devices for indicating and possibly recording the level. The sensing unit comprises thermo-couples each having a measuring junction part mounted in good thermal contact with a body of a material having good heat conducting properties, which body is adapted to be in good thermal contact with the surrounding liquid, and an electrical heating resistor being also in good thermal contact with the body and adapted to be supplied with a suitable electrical current. The reference junction part of the thermo-couple is arranged in good thermal contact with the surrounding liquid and has such a vertical distance from the measuring junction part that any significant heat from the body cannot be transferred through the liquid or in any other way to the reference junction part, said vertical distance being not so great that vertical temperature variations in the liquid influence the measurement. The signal from each individual sensing unit is fed separately to the electrical measuring circuits.