PSEN ma2.1p-10/3mm/1switch 506400 Magnetic safety switch 1 n/o 1 n/c, 4-pin M8 male connector, square design, IP67, operating distance 3 mm, height design 13 mm, for series connection with PSEN i1, PU = 1 sensor without actuator. Our magnetic sensors PSENmag are ideal for monitoring safety gates and positions for all applications thanks to their manipulation-proof concept.