ATEX zone 1 certified II 2G Ex d IIC T6 heat detector, with rate of Rise and/or static alarm. Internal status LED. Automatic or manual Reset. IP65 aluminiun alloy housing and chrome plated brass probe (stainless steel available) with one 1/2″ NPT way connection opposite to the probe side (J model) or two 1/2″ NPT way connections on the two sides (T model).