As part of ITER's fusion diagnostic systems, miniaturised metal resistor type bolometer cameras are envisaged to provide the measurement of the total plasma radiation. For this kind of bolometer sensor, the temperature of a measurement and a reference absorber is realised by metallic meanders on their back side. For the reference absorber being able to reliably compensate changes in the environmental temperature, it is necessary to assure that the temperature gradient within one bolometer channel is as low as possible, preferably <0.1°C. In order to successfully establish this condition, the entire design of the sensor mount, camera housing and wall attachment have to be considered. A particular region of interest in ITER is the divertor because of bolometer cameras in this area having an asymmetrical design w.r.t. the thermal flow path. Due to the high number of differently oriented cameras required in ITER, the main goal of this study is to map the thermal behaviour of these devices under typical loads and, identifying the underlying principles to provide universal guidelines and starting points for future designs, in order to prevent one by one optimization of each separate camera.