aluminium, ATEX/IEcex Ex II 2 G D Ex db eb op is IIC T4 Gb, Ex tb op is IIIC T96°C Db (-55°C < Ta < +75°C)/EN-54-10/CPD/DNV-MED/SIL2 approved, c/w Heated Window Optics, Built-in-Test feature, ABS ATEX Weather Shield, calibrated to 75°C, wiring option #1, relays/0-20mA/RS485/HART outputs and 2 x M25 cable entries, IP66+67