A Sensitive Electronic Liquid Level Indicator for Condensed Gases
The difference between the dielectric constant of the liquid and gaseous phases of a substance can be and has been used1,2 to indicate the height of the liquid in a container. The change of capacitance of a vertical plate capacitor with level of liquid between the plates can conveniently be employed. The circuit given will indicate a very small change of capacitance and is ideal for this purpose. For a change of 30 micro-microfarads in about 450 the change of cathode current in the 6L6 is approximately 2.5 milliamperes.
KeywordsDielectric Constant Cathode Current Volt Peak Point Breakdown Liquid Hydrogen
- 1.S. C. Coroniti, Electronic Liquid Level Indicator, Rev, Sci. Instr. 13, 484 (1952). Coroniti applied a device similar to the one described to both electrolytic and non-electrolytic liquids at normal temperatures.Google Scholar