INDUCTIVE SENSOR, 4 MM FLUSH, UP TO SIL 2 ACC. TO IEC 61508, NAMUR OUTPUT, STAINLESS STEEL HOUSING, POLARITY REVERSAL PROTECTED, 0-3.24 MM ASSURED OPERATING DISTANCE, 3.6 - 4.4 MM TYP. ACTUAL OPERATING DISTANCE, 2-WIRE OUTPUT TYPE, 0-1.5 KHZ SWITCHING