Best sensor to detect a coin through a slot

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A tutorial on how to understand the sensor interfacing requirements for both PNP and NPN

book of the dead slot game Slot width: 2 mm, Switching function: Normally closed , Output type: NAMUR with safety function, Nominal voltage: V

situs slot mantap 168 slot for supplying the lower layer is smaller than the width of the slot for SENSOR 28 36 30 EDDY