How does a smoke alarm work?

January 10, 2022

Before introducing the working principle of the Smoke Alarm, we first introduce the concept of the smoke alarm, the smoke alarm, nicknamed the fire smoke alarm, Smoke Sensor, smoke sensor, etc. Generally, independent, physical product battery-powered or AC-powered batteries are used as backup power, and those that can give sound and light instructions when an alarm is ready are called independent Smoke Alarms. Powered by the bus, there can be multiple connected to the bus, and an alarm system is formed by networking with the Fire Alarm controller and communication. There is no sound on site when the alarm occurs, and the host has sound and light prompts. Device. Smoke detectors are classified with or without address coding.

How Smoke Detectors Work

In terms of internal principles, smoke alarms implement fire prevention by monitoring the concentration of smoke. For example, Langxin smoke alarms use ionic smoke sensing. It is an advanced technology, stable and reliable sensor, and is widely used. Applied to a variety of fire alarm systems, the performance is far better than the gas-sensitive resistor fire alarm.

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 respectively 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. Interfering with the normal movement of charged particles, the current and voltage will change, and the balance between the internal and external ionization chambers will be disrupted. Therefore, the wireless transmitter sends out a wireless alarm signal to notify the remote receiving host to transmit the alarm information.

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