The USGS Pygmy-MH meter is a magnetic head current meter with the same basic design as the standard Pygmy meter with the exception of shaft and binding post contact. The Pygmy-MH has a miniature reed switch and magnetic shaft which allows for reduced friction for better low velocity response and produces a cleaner signal for the AquaCalc 5000 and AquaCount. The meter uses the standard Pygmy rating table.