Smoke Detector Buying Advice
Smoke detectors are one of those amazing inventions in modern world. Because of their obvious potential to save thousand of lives and property each year, smoke detectors are getting more and more important for people’s safety. In fact, it is recommended that every home have one smoke detector per floor. Most smoke detectors consist of two basic parts: a sensor to sense the smoke and a very loud electronic horn to wake people up. There are two main types of smoke detector commonly available
on the market.
One type uses the radiation from a small amount of radioactive material to detect the presence of smoke or heat sources. These "ion chamber smoke detectors" are the most popular, because they are inexpensive and are sensitive to a wider range of fire conditions than the other type. Ionization chamber smoke detectors contain a small amount of radioactive material encapsulated in a metal chamber. They take advantage of the ions created by ionizing radiation to develop a low, but steady electrical current.
Smoke particles entering the chamber disrupt the current and trigger the detector's alarm. Ionization chamber detectors react more quickly to fast flaming fires that give off little smoke. An ionization chamber for use in a smoke detector includes first and second outer electrodes and a non-reflective center electrode. The non-reflective center electrode can be formed as a metal electrode having a non-reflective coating or as a non-reflective; conductive plastic elements. The ionization chamber can be incorporated
into combination smoke detector, which includes a photoelectric sensor. A non-reflective center electrode, associated with the ion-type sensor is symmetrically located in the detector and displaced from the photoelectric sensor.
The other type of detector does not contain radioactive material; it uses a to detect the change in light level caused by smoke. This type is more expensive to purchase and install, and is less effective. Most photoelectric sensor smoke detectors use 100V-240V AC input. It also can use 9V spare replaceable battery when the AC power is out. It is always specially designed for convenient installation and wiring module protection. This kind of smoke detector is easily adapted to different environment. CMOS
design and light labyrinth photoelectric sensor smoke detector. People can apply manual testing for new detectors. High stability and high density SMT design help to provide quality service to not only homes but also commercial areas like offices and hotels. Unique structure with dustproof, anti-fly and anti-light design makes it easy to maintain. Auto reset function relieves your concern of resetting the smoke detectors after a power blackout.
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