1. Overview

Independent photoelectric fire alarm smoke detection (hereinafter referred to as alarm) is infrared photoelectric sensor produced with special structure design, reliable performance MCU, and SMT chip processing technology, easy to use and so on. This product is suitable for smoke detection and alarm in factories, homes, shops, machine rooms, warehouses and other places. This product is not suitable for the following places: Under normal circumstances, there are places where smoke stays. Places with heavy dust, water mist, steam, oil mist pollution and corrosive gas.Places with relative humidity greater than 95%. Places with ventilation speed greater than 5m / s.

2. Working principle

The alarm adopts a photoelectric sensor with a special structure design combined with a reliable MCU, which can effectively detect the smoldering stage at the beginning of the fire or the smoke generated afterwards. When the smoke enters the alarm, the light source is scattered, the light receiving component feels the light intensity, and the received light intensity has a certain linear relationship with the smoke concentration. When the light intensity reaches a predetermined threshold, the red LED of the alarm lights up and the buzzer alarm is activated. When the smoke disappears in the environment where the alarm works, the alarm will automatically return to its normal working state.