Patent ID: 11921036
Assignee: nan
Field: Measurement (Instruments)
Classification: CPC G  C  F  Y | IPC F  G

Claim 19:
20. The control system as claimed in claim 19, wherein the industrial furnace further comprising:
a flue duct for directing the off-gas flow,
the energy beam emitter and beam sensor of each of the first and second beam emitter/energy beam sensor pair being provided as part of a combined beam emitter/receptor head for positioning along longitudinally spaced side portions of the flue duct, and wherein each of the first and second beam emitter/energy beam sensor pairs further includes an associated reflector assembly,
each reflector assembly being provided for positioning along a side portion of the flue duct generally opposite to the associated beam emitter/receptor head and configured to receive and reflect the respective energy beam emitted through a generally central portion of said off-gas flow and towards the associated beam sensor.