Spectrex 20/20L (LB) - UV/IR Flame Detector - Manual (Page 17)

Spectrex Inc. - SharpEye TM UV/IR Flame Detector Manual – TM20/20LB Rev E, August 2004
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3.2 Cone Of Vision
Horizontal: 90°
Vertical: 90°
Figure 3 illustrates the relative range as a function of the incidence angle.
Figure 3. Horizontal and Vertical Fields of View