Smoke detectors use a photoelectric beam between a receiving element and light source. If smoke obscures the beam an alarm is sounded. There are also refraction-type models that measure the light changes that occur within the instrument when smoke particles enter it.
Return & Warranty Policy
We accept returns within 30 days of your purchase. Items must be in their original condition with tags and packaging intact. To initiate a return, please contact our customer support. Refunds will be processed within 7 business days of receiving the returned item. Shipping costs are non-refundable.
