Flame Detector Coverage Calculator

Calculate flame detector cone of vision coverage area and optimal mounting height per NFPA 72.

Input Parameters

Results

--
Floor Coverage Radius
ft
--
Floor Coverage Area
sq ft
--
Detection Angle to Floor
deg
--
Slant Range to Edge
ft
Note: Flame detectors per NFPA 72 Section 17.8 are rated by cone of vision (typically 90-120 deg) and maximum detection range. UV, IR, UV/IR, and multi-spectrum IR types have different sensitivities to fire size and false alarm immunity.

Reference

Half-Cone Angle = Cone of Vision / 2 Floor Radius = Mounting Height x tan(Half-Cone) Slant Range = sqrt(Height^2 + Radius^2) Coverage Area = pi x Radius^2 Detection Angle = arctan(Height / Radius) NFPA 72: Flame detectors rated by cone of vision and max range per FM/UL listing.