Mechanical counter 1,non-reversible version: it has stop mechanism for wheel reverse rotation 2.Mainly export Europe.INDIA,ETA Mechanical counter +Current transformer1. ... : 430±5%ohm5. Velocity ratio 10:1,20:1,80:1,100:1,200:1,400:1,800:1,1000:16. Working frequency 6Hz7. Step ... ,Error-free working period (≥10years) 13. Base frame material:(1.aluminum alloy base frame: ; 2.plastic base frame:PC) ...