TELEMACO is a Differential Absorption Lidar (DIAL) apparatus able to measure the profile concentration of several chemicals (pollutants, CWA, etc.) in the environment. Thanks to its tuneable laser, TELEMACO can scan 66 different wavelengths and it can covers a range of about 2 km. The equatorial mounts allow to scan an area or a volume, and the measurements are so fast to be considered in real-time.