Do you know the smoke detector photoelectric sensor and ion sensor?

There are two kinds of sensors for independent residential smoke detectors. One is ion sensor, the other is a smoke detector photoelectric sensor.

The ion sensor works by measuring the balance of positive and negative charges in the air. Inside the sensor, there is a small piece of radioactive material that can produce a tiny electric charge in the air flowing in the induction chamber flow. On the circuit board there is a computer chip used to monitor this current. When the smoke particles enter the induction chamber. After that will disturb the positive and negative charge balance there, but also make this current changes. When the smoke Gradual increase in the positive and negative charge imbalance will be strengthened. When this balance reaches a certain limit horn, It will sound. Ion smoke detector is sensitive to tiny smoke particles and can respond well to different types of smoke.

The smoke detector photoelectric sensor  is measured by a beam of light and a light sensor to measure the concentration of smoke. The device is set up. The beam is deviated from the sensor. When the smoke enters the induction room after the smoke particles will be part of the smoke. The beam is scattered onto the sensor. When the concentration of smoke gradually increases, there will be more light beams scattered to the induction. On the device. When the light reaching the sensor reaches a certain level, the buzzer will sound. The photoelectric smoke detector is sensitive to slightly larger smoke particles and less response to soot and black smoke.

Without direct contact with the measured object, the mass of the beam is approximately zero, and there is no friction or pressure on the measured object in the measurement. Therefore, in many applications, smoke detector photoelectric sensor has obvious advantages over other sensors. The disadvantage is that in some applications, optical devices and electronic devices are more expensive and have higher environmental requirements.