M8/M12/M18 - DC 2 Wire (Cable Type) Filters Product Image | Model Number | Diameter | Sensing Distance | Function Sensing Distance Diameter Function Type Housing Length BIR8-TN2FL8mm2mmNOBIR8-TC2FL8mm2mmNCBIR12-TN4FL12mm4mmNOBIR12-TC4FL12mm4mmNCBIR18-TN8FL18mm8mmNOBIR18-TC8FL18mm8mmNC