A facility dedicated to the production of &eegr; mesons has been installed at the Saturne synchrotron with the purpose of investigating rare decays of this meson. The &eegr; are produced by the pd → 3He&eegr; reaction near threshold and tagged by the detection of3He in a magnetic spectrometer (SPES2). A rate of 105/s tagged &eegr; can be achieved. In the first experiment, &eegr; → &mgr;+&mgr;−, the &mgr; will be detected in range telescopes. Magnetic spectrometers for lepton detection are considered for future experiments.