System Sensor BEAMLRK Long Range KitThe BEAMLRK allows reflected beam detectors to be installed at separations between 230 and 328 feet (70 to 100 meters). At these distances, four 8 8 reflectors must be used to provide enough reflected infrared light. This kit includes 3 additional reflectors with new test scale legends. The reflector included with the transmitter receiver unit is the fourth reflector to be used. This kit is not compatible with the multi mount kit (BEAMMMK).