0 inches, so, it may fit nicely even in the living room although some may not appreciate the slight industrial look of the device. The installation process of the SCO501CN 3ST involves choosing the right place in the room keep at least 15 feet from any furnace or fuel burning heat sources, otherwise, it may trigger false alarms and also, it is advisable not to install the smoke detector near the corners of the room, attach the mounting plate to the ceiling or wall using the plastic screw anchors + screws provided into the package and later, simply rotate the device into place lastly, you can test the SCO501CN 3ST by pressing the Weekly Testing button from the front side and this way, you’ll also be able to set the location – press and hold the button until you hear the suitable location and then release it and press and hold it again until you hear that the location has been saved. In the case of the smoke detectors, many people have favourably exchanged their traditional smoke alarm systems for either the Nest Protect or other smart device from the competition, but a large percent of the population would still prefer not to deal with an app or any other unneeded configurations and thankfully, there are lots of regular smoke detectors on the market to choose from. One of them is the First Alert P1010 Micro Smoke Alarm, which, while it has all the expected elements of the traditional smoke detector, it is rather unique from the design point of view yes, I know, First Alert again, but, in truth, there are not that many reliable options on the market right now. Furthermore, besides the transparent Silence / Test button positioned ion the side, there aren’t any other elements to break the minimalist design continuity. At first glance, you’d be tempted to simply position the smoke detector on a shelf and not bothering installing it on the wall or ceiling, but since you want it to detect the smoke as fast as possible, you should mount it on the ceiling and a bit further from the corners of the room it’s also ideal to keep it at least 15 feet away from a fuel burning heat source, so it won’t trigger those annoying false alarms. That being said, the installation process is simple and intuitive: all you have to do is remove the card from the bottom of the mounting bracket, attach the ring to the ceiling or wall using the fixing anchors they’re provided inside the package, fortunately and afterwards, simply rotate the alarm into place. The most popular types of sensors that are used to detect the smoke particles are the ionization sensors and the photoelectric sensors some manufacturers have developed their own proprietary sensors to detect more than one type of fires, such as the case of the Nest Protect with its Split Spectrum sensor. The ionization sensors are used to detect the small particles from fast burning fires, but because of their nature, they’re more prone to false alarms these type of sensors are usually found built into older smoke detectors. The photoelectric sensors can detect larger particles, so it is a lot more useful for smouldering fires those which have not yet erupted into flames, so they’re better for an early detection and are less likely to trigger false alarms. The First Alert P1010 uses the aforementioned technology, so it has a beam of light inside a small chamber which does not directly hit the photoelectric sensor, but, the moment smoke particles enter the device through the holes in the metallic section, the light gets diverted and it will immediately hit the sensor, thus sounding the alarm.