As per ASTM D1883

Water Content and Dry Density of Soils - As per ASTM D1883, As per B.S. 1377:4

Dia of rammer -2”
Weight of rammer 5 lb, 10 lb
Height of fall of rammer 12”, 18”
Wired for 220 volts, single phase, 50Hz supply

Dia of rammer – 50 mm
Weight of rammer 2.5 kg, 4.5 kg
Height of fall of rammer 300mm, 400 mm
Wired for 220 volts, single phase, 50Hz supply