Memminger, in conjunction with Du Pont, has developed the LMT multi-function test instrument for measuring fine count elastane yarns on circular knitting machines. The instrument can determine yarn consumption in millimeters per cylinder revolution for fine yarns between 22 and 44 dtex. The percentage of elastane yarn extension, the weight ratios of the two ground yarns, and the percentage of elastane yarn in the knitted fabric can all be determined. The LMT is equipped with a printer for recording data measurements.