Microcomputer automatic control, press key are touches, complete automated operation. LED shows the hypothesis number and the actual number. Count speed can change, no noise, the precision is higher. Digital, complete  automated operation, changeable counting speed, reset key, automatic stop button, speed regulation option, LED display, thumb wheel switches, digital counter speed regulator, detachable pan, high sensitive sensor. 
TECHNICAL SPECIFICATION
Measuring range:  1-99999
Application scope: 
Small sample                : 0.7 - 4mm x 0.7-12mm 
Big sample                    : 3 - 10mm x 3-12mm
Time for test                  : more than 1000/3minute
Precision                         : big sample: 2/1000
Small sample                 : 4/1000
Power                              : 220V 50HZ