электрическое счетчик импульсов

1.Cixi Zhengning Electromechanical Manufacturing Co., Ltd is specialized in the producing types of counters, mobile vibration motor parts, high precision stamping parts, various control valves used in water and electricity and instrumentation stepper motor. 2.technical parameters 1 working voltage rating 3.5V5.5V 2 electric machinery resistance 450±50Ω20 3 electric machinery output torque 28μNcm/4.5V 4 anti-jamming undesired signal wont be driven under 1.5V 5 fit for the standard GB/T17215 6 range of working ambient temperature -20+55 7 error-free working period one billion pulses 8 velocity ratio 100:1 200:1 400:1 800:1 9 working pulse width 31.25ms 10 applicable frequency 3Hz 11 character wheels have clear number, no malposition and no desynchronizing 12 other technical parameters fit for the standard of pulse counter used in electrical watt-hour meter JB5459-91 All these above technical parameters are the same with chip of US AD7755 and shanghaibeiling BL0932.