Smoke detectors or sometimes called the fire alarm, actually have an official name, Smoke alarm. They are one of the most amazing and useful inventions. They are very popular in the present market and due to their vast production; they do not even cost you high. You will be able to buy one for a very low price. Whether it is a commercial building or a house, many lives were saved due to the invention of this magical device. The installation process of a fire alarm is also very simple. You usually attack or fix them to your ceiling. You should fix them to the ceiling because, whether it is a small amount or a huge amount of smoke, the first place they reach is your ceiling. A smoke detector comes with two important parts – one of them is the smoke detector sensor, and the other is a loud sound. There are two types of smoke detectors widely used at present – Photoelectric smoke detector and Ionization smoke detector. Both the smoke detectors do the same job but in a slightly different manner. When you can understand the working of a smoke detector, you will be able to understand their difference as well.