Meter device of liquid level. (Machine-translation by Google Translate, not legally binding)

摘要

Liquid level measuring apparatus, characterized in that it consists of a chamber communicating with the atmosphere and provided with a waterproof and deformable wall, subjected on the one hand to the hydrostatic pressure of the liquid whose level is to be measured, and on the other hand to an elastic force, whose elastic wall is associated with means, fed by alternating current, of transforming the variations of its position into corresponding variations of the alternating output current, which is rectified and whose magnitude is determined by a ammeter. (Machine-translation by Google Translate, not legally binding)