... is a digit sensor integrated with light,electricity and machine,no machanical contact among coded wheels,with high rotary ... life;especially suitable to movement occasions.Widely applicable to irrigation,CNC machine, textile, eletricity, aircraft, metallurgy, petroleum, chemical and ... 2,Appearance: usually round,various intallment type;diameter of main body:Φ6,Φ8,Φ10,pulse output: 50, 100, 200, 300 ...