Compact light barriers, W27-3 Ex, WSE27X-3P1830, switching distance max.: 0 m ... 35 m, sensor principle: through-beam light barrier, switching output: PNP, switching type: light/dark switching, connection type: cable, 4-wire, setting: none, info: EX II 3G EX nA op is IIB T4 Gc X, EX II 3D EX tc IIIB T135°C Dc X In accordance with Directive 2014/34/EU (ATEX) and DIN EN ISO/IEC 80079-34, we would like to point out that the traceability of the ordered device to your customer is your responsibility (documentation of your customer and the associated product data, such as item no., date code, serial no.).