PIR Motion Detectors Support Energy-Saving Schemes

Finder has expanded its 18 Series of PIR motion detectors, supporting a variety of interior energy-saving schemes. The compact 18.21 and 18.31 variants will meet the needs of higher-ceiling, higher-load switching applications and those requiring a direct interface to a programmable logic controller (PLC) or a building management system (BMS). Recess mounted, the flush-fitting 18.31 is suitable for suspended or plasterboard ceilings while the 18.21 is a low-profile PIR for hard surface mounting.

Providing a 10A-rated normally open volt-free output, the detectors will switch loads at any voltage and are not restricted to 230VAC mains tasks. According to the company, 24VAC/VDC supply versions are also available for applications without a mains supply or where safe, low-voltage operation is required. With a 110deg sensing angle and a reach of 2.8m, the 18.21-0300 and 18.31-0300 PIRs will handle all types of regular ceiling-height applications. For high-bay or extended-ceiling-height duties, the 18.31-0031 PIR variant offers a longer sensing range of up to 8m.

The Finder PIRs also offer an adjustable light threshold setting, enabling operation to be varied according to ambient light conditions. In addition, an enhanced light-on time adjustment of up to 35 minutes makes the PIRs suitable for HID lamp applications, which, for reasons of preserving lamp life, place a restriction on the number of starts per hour.

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