TURCK offers a wide range of magnetic field sensors for areas exposed to explosion hazards caused by gases, vapours or mists. Sensors according to device category II 2 G comply with the requirements of the ATEX directive 94/9/EC and are approved for use in areas subject to occasional explosion hazards (zone 1). NAMUR sensors featuring protection class Ex i (intrinsically safe) fall into this category. The use of category II 1 G sensors is of course also permitted.