... . It can be widely used in metallurgy, petrol, petrifaction, chemistry, light industry, coking, municipal administration, gas, pharmacy, sewage dealing and ... standard signal two wire type output (KQ500-EX three wire type)Sensorelectrochemical sensor; catalytic combustion type sensor for ... typeTransition cable: two core shield cable (KQ500-EX uses three core shield cable), section 2×1.5mm2, external ...