Heat affects image quality and results in visible pixel noise. Fixed pattern noise (hot pixels) will become more visible with increasing temperature - as a general rule of thumb, the sensor's dark current doubles with every 7C to 10C increase in temperature. For optimal image quality and performance, special attention to heat dissipation is required when mounting the camera. Even when the ambient temperature is not excessive, proper heat sink is required to prevent the camera from heating itself to a temperature much higher than ambient.
All Emergent Vision Technologies CMOSIS sensor cameras come with a well designed heat sink for proper operation under the temperature range outlined in the datasheets. Some applications may require additional methods to reduce dark current or perhaps to operate outside of the standard temperature range. Such methods could be active cooling solutions, forced air cooling, heating solutions(for cold environments), or further heat-sinking through mounting fixtures. All Emergent Sony sensor Cameras do not come with a heat sink but they can be purchased as an optional accessory.