... /T5577/ EM4001 / EM4100B. Working frequency: 125KHzC. Sensing distance: 8-20cmD. Thickness: 0.8-1.8 mm, standard size, can be offset, screen printing, printing ... ,TK4100,TK28,EM4001,EM4100,H4001 Working frequency 125KHZ Sense distance 8-20cmMaterial PVC/PET/ABS Size ISO standard size 85.5 ...