The BOS 12M-PA-LE10-S4 (BOS00WF) is a photoelectric sensor from Balluff's 12M series, operating at 10-30 VDC with PNP output and NO/NC switching capability. It features a 30 mm sensing range, M12 male 4-pin connector, and emits red laser light. The housing is constructed with nickel-plated brass for durability.