... Airport, Library, Exhibition Hall,Hospital, hotel, petroleum gas, and other industrial and large commercial area. Feature:1.Multi-loop bus ... caused by short –circuits.2. Support combustible gas detector and toxic gas detector mix network3. May receive 4~20mA signal ... incondensable) Detector model AT0502AH,XP2000,XP3000 Wall-mounted gas detection controller panel for toxic and combustible gas