Telescopes of silicon detectors can be employed to measure charged particle multiplicities at different distances from a target. As a direct application, the possibility of detecting particle decays in the space between two telescopes has been investigated. The tests were performed at CERN in the Omega Prime spectrometer with a35 Gev/c beam of negative π's. The present paper discusses the telescope signal processing, the identification of background sources and the comparison between he charged multiplicities obtained with the Omega spectrometer and with the silicon telescopes. The improvement in signal-to-noise ratio for K0 decay detection achieved with the silicon telescopes is presented.