The electronic belt scale standard configuration all uses the W62C-CS (original 60-12 C) or the W12N-CS (original N12C) type speed measuring sensor, which can be installed directly on the tail drum, the speed measuring roller or the speed measuring roller, the speed measuring roller / roller is installed on the double surface of the return belt, which eliminates the impact of belt slip. The speed measuring sensor is a digital carbon-free pulse generator. ac pulse generator does not need to adjust or replace the charcoal brush. The feeder, feeder, screw scale and other configurations are W62B-CS (original 60-12B,N12B,WTCPLR-10R) or W12B-CS (original) using imported collector or push-pull type photoelectric rotary encoder. The shell material of speed measuring sensor is cast aluminum, which can be used in open air working environment.