Lawson Hemphill Yarn Friction Meter, YFM is a small, handheld, portable instrument that measures the coefficient of friction very quickly and accurately. It provides very quick feedback on the effects of wax, paraffin, sizing material on the overall yarn friction values.

The Yarn Friction Meter adds another dimension of versatility to the measurement of yarn friction. In addition to being able to be stand-mounted for quality control functions and laboratory use, it can be hand held to measure yarn under actual operating conditions. It is direct reading, easy to use, accurate and reasonably priced. It has been engineered to be as rugged and versatile as possible without sacrificing precision and sensitivity. With proper care, this instrument should remain accurate for many years.