A method and a device for the optical distance measurement or for the optical detection of objects with an at least partially specular reflective surface are based on the fact, that light through the specular reflective surface and a diffuse scattering at a reflector is directed to light receiving means and detected there. The RTP tool includes an elongated housing having a heating chamber with a predetermined temperature profile, a supply chamber and a receiving chamber. A second user interface provides functionality for web site operators wishing to host ads on their web sites to select or exclude specific categories of ads to host. , A2 is substituted or unsubstituted 6- to 10-membered aryl, etc. The mass airflow rate and the volumetric airflow rate are then determined.