A totally self contained condensation detector designed to warn of the onset of condensation on a Chilled Beam air-conditioning system and thus preventing ?indoor rain? damaging equipment and furnishings. One detector is needed for each point where cold water enters a ceiling so a large building may have several hundred condensation detectors.
The detectors are not intended to be used to control the temperature of the beams (their recovery time is too slow for that) but to indicate that the beam temperature has been allowed to become too low i.e. they detect a fault which is signalled to the monitoring BMS (Building Management System). These sensors provide a valuable back-up and safeguard to the controlling Relative Humidity and Temperature sensors which are often fitted quite some distance from the beams themselves. The units operate on 24 Volts and their output is via a low current reed relay either factory set as normally open or normally closed. It is worth noting that these units are intended to provide a signal not to operate any high load equipment.