II 1G Ex ia IIC T4 (-40oC ≤ Ta ≤ +55oC) @ 1.1W limitation

(-40oC ≤ Ta ≤ +65oC) @ 0.9W limitation

BS EN 60079-0:2012+A11:2013

Electrical Apparatus for Potentially Explosive Atmospheres – General Requirement

 

BS EN 60079-11:2012

Explosive Atmospheres – Equipment Protection by Intrinsic Safety ‘i’

 

BS EN 61010-1:2010

Safety requirements for electrical equipment for measurement, control and laboratory use – General requirements

 

UL913; 2nd Edition

Intrinsically safe apparatus and associated apparatus for use in Class I, II, III, Division 1, Hazardous (Classified) Locations

 

CSA-C22.2 No157-92

Intrinsically safe and non-incendive equipment for use in Hazardous Locations (Update 2)