Abstract
In this contribution two novel techniques for particle characterisation in dispersed, multiphase flows will be discussed: the time-shift technique and the rainbow technique using femtosecond laser pulses. Both methods are rather new and each offers some very distinct advantages for specific applications. The purpose of this contribution is to briefly outline the physical working principles of each technique and to outline their specific features. This information is meant to stimulate use of these techniques for hitherto inaccessible applications and measurement quantities.