Varioton Sounder EV 11 Signalling Hooter HPW 11   EEx II Telephone 5100/4T EEx II-Weatherproof Telephone FernTel 2/Zone 2   EEx II-Telephone ExResistTel EEx Acoustic Telephone Call Signalling Devices   EEx II Double Strobe Light dSLB 15 EEx II Double Strobe Light dSLB 20   Signalling Light SAM Obstruction Light Skyline Alpha