SREM is a particle detector, developed for space applications. It measures high energy electrons and protons with a fair angular and spectral resolution and provides the host spacecraft with radiation information.  SREMs will be launched on several satellites: Strv-1c, Proba-1, Integral, Rosetta, GIOVE-B, Herschel, Planck, and additional missions are to follow. SREM is the successor of the Radiation Environment Monitor REM.

SREM was developed and manufactured by former oerlikon space in cooperation with Paul Scherrer Institute under a development contract of the European Space Agency.