... of anti-corrosion; sensor filter for stainless steel particles, good air permeability. Product installation Body Material: die-cast aluminum Dust cover ... of the controller: RBK-6000-2,RBK-6000-6 gas alarm controller Detection range :12-15 square, combustible gas catalytic combustion ... steam, soot place of influence; 2, to the air intake, ventilation fans, door air volume flow; 3, water vapor, and more ...