(a) radiometer detector for measurement of invisible infrared radiation, having an optical sub-system including an integral processor means for calculating and for adjustably focusing an invisible infrared image of said energy zone;

(b) laser directed non-contact sighting means mounted on and coupled to said radiometer to produce a visible aiming display pattern on said surface which identifies to the system user the position, outline and extent of said energy zone for hand-direction of said system;

(c) distance measurement range-finding sub-system means mounted with and coupled to said optical sub-system and integral processor of said radiometer, which optical sub-system conforms the variable focus optical system of the radiometer to focus upon and to cause the detector field of view to embrace the visible display pattern indicating the measurement area of the energy zone by accessing optical chart data stored in the processor memory of the radiometer and outputting a signal indicating a measured distance between said zone and said detector;

(d) measurement display means, both on an LCD mounted and coupled with the radiometer, and also separately providing a visible display on the measurement surface, which display means indicates and identifies both the distance between the radiometer and the image of the energy zone on the measurement surface and also the value of the measured temperature; said range-finding sub-system being coupled to said optical sub-system which displays an image determined by said processor from received measured distance signal; including an analog circuit to receive output of the radiometer detector and of the range finder and which includes a processor and digital measurement display to capture a visible energy zone image and indicates the measured temperature, the measured distance and the extent of said energy zone in said optical sub-system visible display.