For magnetic fusion devices good confinement of fuel and fusion products is an important scientific goal on the path to a burning fusion reactor. Of particular interest is the direct measurement of fusion products lost from the plasma. Appropriate diagnostics are currently operating at the divertor-tokamaks ASDEX-Upgrade and JET. Both have ITER-like plasma cross-sections and can be used for extrapolations. The basic principle of the probes at both machines is the same: gyrating particles pass a collimator and impact on a scintillating plate when the particle's gyro-radius and pitch-angle meets the design criteria. The scintillation light is recorded by a detection system (CCD camera and/or photomultiplier tube).