Patent ID: 6526824
Filing Date: 2003-03-04
Classification: G01F

Abstract:
A container for high purity chemicals comprising a shell with an external surface comprising a top surface, a side surface and a bottom surface, at least one orifice capable of being used as an inlet, at least one orifice capable of being used as an outlet, an ultrasonic level sensor affixed to the external bottom surface of said shell for determining the amount of high purity chemical in said container and a diptube connected to one of said orifices through which high purity chemical can be dispensed from said container or pressurized gas can be delivered to the container to dispensed chemical, a sump in said bottom surface into which a lower end of said diptube terminates, said sump sized to accommodate said lower end of said dip tube and a detection zone for said ultrasonic level sensor to determine the amount of high purity chemical in said sump, wherein said ultrasonic level sensor is positioned adjacent said sump to at least determine the amount of chemical in said sump.