fuel reservoir 208 an igniter transformer 210 a compressor 212 and a fuel metered pump 214 the various components are supported by a housing 216 referring now to fig3 and 4 the combustion chamber components of burner 200 are described in more detail flame tube 202 may include an outer barrel 402 and an inner barrel 404 an atomizing chamber 408 is rearward of the flame tube 202 and receives fuel from fuel reservoir 208 pathway not shown a mounting ring 412 is mounted on the rear of atomizing chamber 408 a support 410 is mounted in rearward of ring 412 and supports photodiode 102 atomizing head 408 includes an aperture 414 substantially at the center thereof through which light from within flame tube 202 can reach photodiode 102 a casing 406 which is part of the blower 204 has a flange that engages with the rear of outer barrel 402 components are connected and mounted in manners known in the burner art and not further discussed herein in operation igniter transformer 210 ignites atomized fuel sprayed by atomizing chamber 408 to generate a flame plume in flame tube 202 toward the distal end of flame tube 202 and may depend on.