Full control of temperature and never again a risk of causing damage. HL Scan measures the temperature at the workpiece surface while working on it with the hot air tool. An acoustic signal sounds as soon as heat either exceeds or falls below the ideal temperature. The display also shows whether workpiece surface is too hot or too cold. Red means too hot, green means ideal temperature and blue means too cold. The HL Scan can be fitted to hot air tools HL 1920 E, 2020 E, HG 2120 E and HG 2320 E. The warning tolerance range can be selected to suit individual needs. If chosen, the visual and acoustic warning can be deactivated.