SITRANS WS300 Speed sensor: shaft mounted, 0.3 … 2 000 rpm, with up to 2 000 pulses per revolution. Resolution: 2000 PPR Enclosure: Polyester painted aluminum, NEMA 4X Approvals: CSA/FM Class II, Div. 1, Groups E, F, G and Class III ATEX/IEC Ex II 2D, Ex tD A21 IP65 T70 C, CE, C-TICK Ex tD A21 IP65 T70 C NEPSI, CCC Connections: Standard, up to 2 integrators Switch Isolator: Not required .