1. Harry N. Norton, Handbook of Transducers for Electronic Measuring Systems (Prentice‐Hall, Englewood Cliffs, N. J., 1969). This book and the references cited therein offer a fairly complete presentation of the various liquid level transducers, their principles of operation, and uses.
2. J. A. Dinkel, Rev. Sci. Instrum. 37, 1549 (1966).RSINAK0034-6748
3. J. P. Villeneuve and Y. Ouellet, Rev. Sci. Instrum. 49, 1425 (1978) and references cited therein.RSINAK0034-6748
4. R. S. Crisp, J. Phys. E 3, 566 (1970).JPSIAE0022-3735
5. F. De La Cruz and O. J. Bressan, Rev. Sci. Instrum. 40, 483 (1969).RSINAK0034-6748