Unshielded, Square type, DC 2-wire models, Sensing distance 5 mm ±10%, NO, Pre-wired models.Sensing head size17 mm x 17 mm x 28 mmTypeSquare type, UnshieldedPower sourceDC 2-wire modelsSensing distance5 mm ±10%Setting distance0 to 4 mmOperation modeNO.Sensing head size17 mm x 17 mm x 28 mmTypeSquare type, UnshieldedPower sourceDC 2-wire modelsSensing distance5 mm ±10%Setting distance0 to 4 mmOperation modeNO