Patent ID: 6310574
Filing Date: 2001-10-30
Classification: G01F

Abstract:
A level transmitting device using electromagnetic waves for measuring the height of a product in a container having an orifice therein having an area substantially less than the surface area of the product in the container, the device comprising:a microwave source creating electromagnetic waves with a frequency of at least about 24 GHZ mounted at the orifice with threading of the microwave source constructed and arranged for engaging matching threading of the orifice;a microwave horn antenna operatively coupled to the microwave source and mounted at the orifice in the container for sending the electromagnetic waves into the container and for receiving a reflected electromagnetic wave from the container, the orifice having a diameter of less than 4 inches;a microwave receiver operatively coupled to the antenna for receiving a reflected electromagnetic wave from surface of the product within the container and transmitting an output signal indicative of the level of the product in the container.