You are about to watch a comparison detection and extinguishing test of a 1x1ft gasoline pan fire in a crew compartment of a combat vehicle.
The first system (Stryker) incorporates dual IR optical sensors. The second system (Spectrex) incorporates UV/IR optical detectors.

 

Things to notice:

The first system (Stryker) The second system (Spectrex) 
The dual IR based detectors did not respond to 1x1ft gasoline pan fire. Manual extinguishing by covering the flame was required  The UV/IR based detection system reacts instantaneously, detects the 1x1ft fire and activates the extinguishing