--\nOur eBay Store\n\nPlease note: This item has a longer lead time for dispatch then normal as it's a non-stocked item that is ordered in, please see the estimated delivery date by eBay. We will of course ship the item sooner if possible.\n\nABUS RM1000 12V Optical Smoke Detector\n\nProduct Details\n\nThe ABUS RM1000 12V Optical Smoke Detector reacts to visible smoke particles - if too much smoke enters its measuring chamber, an alarm is triggered. In the measuring chamber, an integrated infrared light source generates a light pulse every 8 seconds. \nSmoke particles from a fire change the light signal received by the light diode - a relay trips and the alarm centre reports a fire alarm. The 12V optical smoke detector is mounted on the ceiling in the center of the room. The minimum distance to the side wall should be 30cm - we recommend a separate smoke detector for each entrance area, staircase, living-room, and bedroom. \nBy changing a jumper, you can configure the optical smoke d;