Industrial Grade Conventional Multi-sensor Fire Detector (9-36Vdc operated, Smoke + Heat + VOC + CO Gas combination detection, avoid false alarms by dust, water vapour or electromagnetic interference, with relay contact output/RS485/CAN option, Operating temperature: -40-+85℃, EMC: Electrostatic discharge ESD 1.5KV, Electrical fast transient/Burst EFT level 4, alumina body with 22mm ultra-thin size)