Detection Device 2 : Electrical, pneumatic, thermal, mechanical, or optical sensing instruments, or subcomponents of such instruments, whose purpose is to cause an automatic action upon the occurrence of some preselected event
NFPA 96 Standard for Ventilation Control and Fire Protection of Commercial Cooking Operations, 2008 ed. http://www.nfpa.org/codes-and-standards/document-i nformation-pages?mode=code&code=96, (Std: Vent Control and Fr Prac of Comm Cooking Opr - Amer) {240 NFC}