Pressure switch; ATEX II 1/2G Ex ia IIB T4 Ga/Gb, II 2G Ex ia IIC T4 Gb, II 2D EX ia IIIB T135°C Db; Change-over contact; Diaphragm FKM; Setting scale; 250VAC/6A; Male thread 1/4"; Application: Air, Water, Neutral oils; Range of adjustment 50...250mbar; Overpressure protection 1bar; Hysteresis range 20mbar