A Digital Non-Contact Microwave Instrument for Egg Size and Shape Index Measurements

An instrument is described which measures the size of an egg by means of a non-contact microwave transducer. By a single frequency count it is possible to classify an egg in one of the four standard grades: extra large, large, medium, and small. Such measurements can be made, by an electronic counter, with the egg moving at conveyor belt speeds of up to 300 feet per minute. In this case the eggs must be at least six inches apart. The egg shape index may also be measured by taking two separate frequency counts as described in this paper.