Provided Infrared Thermometers are offered with non-contact infrared mensuration of surface temperature. These enable simple pick of emission level via stored materials list. Provided with highly visible marking of the measuring spot, image documentation with readings, these can carry out non-contact as well as app-controlled measuring of fuse, wall temperatures and component temperatures in air conditioning instrumentality. These work well in conjunction with a tablet or smart-phone. Serving as the compact thermometers for fuse & wall temperatures, these can work as the optimal air conditioning systems. The measuring point is clearly marked with a laser circle assembled of eight dots. Infrared Thermometers are characterized by specifications including angular coverage and accuracy.