Measuring level of electrically conducting liquid - has measuring of infusion liquid or blood from change in capacitance of electrodes in measurement liquid

摘要

The level of an electrically conducting liquid is determined from the capacitance change of a capacitor contg. two electordes. The wall of the container holding the liquid is a dielectric which determines the capacitance. The electrically conducting liquid (15) forms one of the electrodes whose change in area is evaluated. The other electrode (5) is mounted outside the container and extends over the entire possible fill height. USE/ADVANTAGE - For accurate simple measurement of the level of infusion liquid and blood in medical applications, esp. in an infusion spray pump drop chamber and esp. of small quantities.