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4. Where’s it going? Technology has inevitably moved on and most quality PIRs now offer more sensitive presence detection. Remember, PIRs are often installed so that lights or fans turn off when a space is empty,
manufacturer has put the effort into design. We think our new low profile design will look good in any setting. As a general rule, a ceiling height of 2.5m will
give optimum coverage, nearest to the diagrams in the manufacturer’s instructions. Installers also need to know that highly reflective surfaces and heat sources like extractor fans nearby can interfere with sensitivity. They may also need to bear in mind that sensitivity is greatest for movement across the field, rather than
the list of requirements for every new product we introduce. Installers’ time is money! PIR detectors are big business – make sure its good business and your profits aren’t eaten away by returns of perfectly good products that could have been avoided if the right choices were made at the counter. The bottom line, as ever, is branded quality assurance – good products, good information and good, free tech desk back up for installers.
so they need to be able to tell the difference between an empty room and someone working quietly at a desk. If they do specifically state that they offer presence detection, it is likely that the design is newer and all of the componentry is bang up to date. Will the detector be surface or flush mounted in a standard ceiling aperture? How important are looks to the end user? Surface mounted doesn’t have to mean clunky looking if the
directly towards it
when choosing locations. It may be that they will need an easy option for masking part of the detector to avoid nuisance switching. Setting up needs to be straightforward, because it’s usually done at the top of a ladder! So too does installation, and larger terminals are an essential in our view. We put them high on
Will the detector be surface mount or flush mounted into a standard ceiling aperture? How
important are looks to the end user? Surface mounted can also mean style with functionality!
ewnews.co.uk March 2019 electrical wholesaler | 11
Master and slave _ up to 5 slaves can be plugged in in series
timeguard.com
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