Sensor for detecting predesigned filling interface of container

Application Number  00128552 Application Date  2000.11.17
Publication Number  1297140 Publication Date  2001.05.30
Priority Information   1999/11/19 CH 1999 2120/99  
Applicant(s) Name  ESEC Trade AG  
Inventor(s) Name  Thomas Gantz;Jugin Mahardt  
Patent Agency Code  11038 Patent Agent  yang guoxu
AbstractSensor comprises three capacitor electrodes (5-7) arranged in parallel planes with a hole passing through the capacitor plates for a fluid container, the fluid level of which is to be measured. First and second capacitors (8, 9) formed between the three plates form part of first and second RC- members. The latter have different time constants and level measurement is by use of relative alteration of the two time constants, so that the sensors do not require setting or calibrating prior to use.