烟雾报警器 系列产品中的一种。 The full name of the independent smoke alarm is an independent photo-electric smoke fire detection alarm, referred to as an independent smoke detector or an independent smoke detector, which is one of the smoke alarm products. The alarm adopts photo-inductive smoke devices and excellent production technology. It is stable in work, beautiful in appearance, simple to install, and requires no debugging. It can be widely used in hotels, stores, Internet cafes, song and dance halls, cafes, leisure halls, houses and other places for fire safety. monitor.
One is an ion smoke detector and the other is a photoelectric smoke detector. It has a radiation source 241 inside and outside the ionization chamber. The positive and negative ions generated by the ionization move to the positive and negative electrodes under the action of the electric field. Under normal circumstances, the current and voltage inside and outside the ionization chamber are stable. Once smoke escapes the ionization chamber. The disturbance disturbs the normal movement of the charged particles, causing the current and voltage to change, which destroys the balance between the internal and external ionization chambers, and then sends a signal. There is another type called a photoelectric sensor. It has a light-emitting element and a light-sensitive element. The light emitted by a normal light source passes through the lens to the light-sensitive element. The circuit remains normal. If smoke is blocked from it, the light reaching the light-sensitive element Significantly weakened, so the light-sensitive element changed the change in light intensity into a change in electricity and warned people through the amplifier circuit. There is also a pipe-suction smoke detector, which works similarly to the other scattering type in the photoelectric sensor. It generates light-sensitive current through the reflection or scattering of smoke, which is mainly used on ships. In recent years, laser smoke detectors have also appeared, which also use the principle of photoelectric induction, the difference is that the light source is changed to a laser beam. This type of detector uses semiconductor devices, which are small in size, low in price, vibration-resistant, and long-lived, and have great development prospects.
> Working voltage: 9V carbon battery or alkaline battery
> Static current: ≤20uA
> Alarm current: ≤15mA
> Smoke sensitivity: secondary
> Working temperature: -10 ℃-+ 50 ℃
> Relative humidity: ≦ 95% RH
> Alarm sound: ≥85dB
> Reference standard: EN14604
> Battery life: at least 1 year