Patent ID: 6606053
Filing Date: 2003-08-12
Classification: G01F

Abstract:
A device using microwaves for measuring the height of a product in a storage vessel having an orifice therein, the orifice having a first thread, the device comprising:a microwave source creating waves with a frequency of at least about 24 GHZ; a second thread for engaging the first thread of the orifice of the storage vessel to connect the device to the storage vessel, wherein the second thread has a diameter of less than 4 inches; a horn antenna operatively coupled to the microwave source and to be brought into the orifice of the storage vessel for sending the microwaves into the storage vessel and for receiving a reflected wave from the container, wherein the horn antenna is arranged after the second thread seen in sending direction of the microwaves and has a diameter less than the diameter of the second thread; a microwave receiver operatively coupled to the horn antenna for receiving the reflected wave from a surface of the product within the storage vessel and transmitting an output signal indicative of the level of the product.