The European XFEL uTCA based Beam Loss Monitor System (BLM) is composed of about 470 monitors using photomultiplier tubes (PMTs). BLMs installed in the SASE undulator intersections show high signals at electron energy higher 16 GeV or photon energy higher14 keV due to background synchrotron radiation which directly affects the PMT. The amplitude of this signal canged that high that, also without using any detector material, the BLMs get blind for real losses. Also different lead arrangements did not shield the signal sufficiently.First tests show that a Silicon photomultiplier (SiPM) is not affected. Also there are several advantages to use SiPM, they are cheaper by factor of 40 and operating voltage is below 35V. First test results will be presented and how it can get implemented in the existing BLMs and BLM system.