System Sensor #OSP-004, OSI-R Beam Detector Test Filters (10 Pack),
$194.50
OSI-R Beam Detector Test Filters. Ten Pack. System Sensor Model #OSP-004. These are for the new System Sensor OSI-R Beam Detectors. The will work with the System Sensor #OSI-R-SS units, OSI-R-SK Silent Knight units and the OSI-R-FL Fire Lite units. They will not work with older style Beam Detectors. Brand New Filters Purchased directly from System Sensor. Units have never been out of the box. You will get 10 filters with this listing. 10 per pack. Just received 03-31-2026..
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System Sensor #OSP-004, OSI-R Beam Detector Test Filters (10 Pack),$194.50
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