The high performance photoelectric smoke detector Hochiki SLR-E3 with detachable sensor chamber includes an LED and a photodiode. It is designed so that the LED light does not reach the photodiode under normal conditions. When smoke particles enter the chamber , the light is reflected and a part of it reaches the photodiode. This is converted into an electronic signal which then activates the detector. The chamber can be easily removed for cleaning and it is designed to allow the entry of smoke entry while tackles the entry of light.