Microwave detectors from CP Electronics have been used to control the lighting in the refurbishment of one of the campus buildings at Exeter University.
The project involved the use of CP’s MWS1 and MWS3 microwave detectors to provide dimming, daylight dimming, energy savings, absence and presence detection in open plan offices, corridors and cellular offices to improve energy efficiency. The building that has undergone the refurbishment is a nine storey structure and the top three floors have been completely refurbished whilst minor works have been carried out on levels two, five and six.
CP presence detectors have been installed in all office spaces to ensure that lighting is not used unnecessarily. With each presence detector controlling a pre-defined lighting zone, the users are able to achieve control over their workspaces while ensuring that occupied areas are adequately lit. The system also provides daylight linking on the desks closest to windows so that illumination can be dimmed in those areas when sufficient natural daylight is available thus saving energy.
With a detection range of up to 30 metres, CP’s MWS1 wall mounted microwave sensor is ideal for controlling illumination over large areas, particularly corridors. The MWS-3 Multi-Sense from CP has been designed for flush mounting in open plan areas, corridors and aisles. Unlike fixed head sensors, the MWS-3 utilises an adjustable sensor head to provide a unique presence detection capability. By changing the angle of the sensor head, different detection patterns are achieved for variations in area coverage with a reduced number of sensors required.
The units were specified by the university based on experience, as CP sensors have been incorporated in the refurbishments of other campus areas. The key factors in the specification of the lighting management system were energy savings, ease of installation with minimum disruption, proven reliability and cost competitiveness. Further benefits are achieved from the longer lamp life achieved through lower usage, resulting in extended re-lamping cycles and reduced maintenance costs, as well as fewer used lamps to dispose of under the WEEE Directive.