System Sensor BEAMHK Beam Detector Heater KitThe BEAMHK allows the transmitter receiver of the reflected beam smoke detectors to operate in environments prone to the formation of condensation. 2 Condensation forming on the beam detector unit may result in trouble or false alarm conditions. BEAMHK will lessen the likelihood of condensation by maintaining the unit at a temperature that is slightly higher than the surrounding air. The kit requires the use of an additional power supply for