... and best quality 2,100:1, 200:1 3,5+1 or 6+1 digits 4,Bigger wheels and anti-magnet ISO9001: 2008 RegisterKey ... for Electric Energy Meter1. Pulse ratio specification: 10: 1 20: 1 40: 1 80: 1 100: 1 200: 1 400: 1 800: 11000: 12. Start-up work voltage ... 6.5v4, Pulse width: 70 to 320ms5,Working temperature: minus 40 to plus 706, Working frequency: 6Hz7,Motor torque output: 30mNm8 ...