These are 2-wire magnetic switches metallic housing version made of reed contacts held in a glass bulb.
They come in a cylindrical housing, continuous voltage and normally open contact. They are CE approved according to the CE Certification, Atex approved according to Directive 2014/34/EU ATEX, they are also CoC approved according to the International Certification IECEx. They can be used in potentially explosive environments with the presence of Air/Gas and Air/Dust mixtures, in conformity with Group II classification, category 1G-2G-3G and/or 1D-2D-3D according to Directive EN60079-0, EN60079-11, EN60079-26, IEC60079-0, IEC60079-11 and IEC60079-26. Type of protection used against explosion: "m" (encapsulation).