Unshielded, Square type, AC 2-wire models, Sensing distance 20 mm ±10%, NC, Pre-wired models.Sensing head size40 mm x 41 mm x 53 mmTypeSquare type, UnshieldedPower sourceAC 2-wire modelsSensing distance20 mm ±10%Setting distance0 to 16 mmOperation modeNC.Sensing head size40 mm x 41 mm x 53 mmTypeSquare type, UnshieldedPower sourceAC 2-wire modelsSensing distance20 mm ±10%Setting distance0 to 16 mmOperation modeNC