извещатель пожарный пламени(A sensing device which indicates whether or not a fuel is burning, or if ignition has been lost, by transmitting a signal to a control system. MHST Alexander Demidov); устройство обнаружения пожара(A flame detector is a sensor designed to detect and respond to the presence of a flame or fire, allowing flame detection. Responses to a detected flame depend on the installation, but can include sounding an alarm, deactivating a fuel line (such as a propane or a natural gas line), and activating a fire suppression system. When used in applications such as industrial furnaces, their role is to provide confirmation that the furnace is properly lit; in these cases they take no direct action beyond notifying the operator or control system. A flame detector can often respond faster and more accurately than a smoke or heat detector due to the mechanisms it uses to detect the flame. WK Alexander Demidov)
