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The role of each sensor in the air purifier dust sensor selection recommended

Update: 2020-10-16 14:44 Source: LUFTMY Reading: ↻ News
 

There are many categories of air purifiers, according to different properties of the classification is also different, simply divided into physical purification and chemical purification.Physical purification is adsorption, such as HEPA filter, activated carbon adsorption, chemical purification is decomposition, mainly targeting at harmful gases.The technical principle is high energy particle oxidation.Of course, the sensors used for signal acquisition and detection in the front segment are basically the same, roughly using air quality sensors and PM2.5 dust sensors.

The role of each sensor in the air purifier dust sensor selection recommended

The progress of "sensor technology" is closely related to people's understanding of "air quality (the type and degree of air pollution)" and the development of times' demands.In the field of smart home, people want to pursue quality life, one of the requirements is the use of various smart home products have a certain comfort.Humanized details of the design, is a smart home brand pursuit of excellence, for the sake of the embodiment of customers.Currently, air purifiers on the market generally have three kinds of sensors -- temperature and humidity sensors, odor sensors and dust sensors.

Temperature and humidity sensor

The function of humidity sensor is to manage the operation of the necessary "humidifier" of air purifier.Test the humidity in the room (dry condition).According to this data control humidification amount to maintain the most comfortable humidity.

Smell sensor

In the 1980s, air purifiers sought to "remove the smell of smoke."Among the sensors, the air purifier is first equipped with a "smell sensor".The function of the smell sensor is to detect the concentration of "smell" substances floating in the air.When the surface of a sensor made of MOS absorbs odor molecules, the electrical conductivity increases and the resistance decreases.The sensor determines the concentration of odorous substances by detecting the resistance value.

Dust sensor

Particulate matter sensors, also known as PM2.5 sensors, target particles larger than odorous substances.Its detection USES optical methods."When light hits the air, if there is dust in the air, the light scatters.The dust sensor detects dust by measuring the amount of reflected light.Current sensors measure not only the amount, but also a certain threshold as a benchmark to determine the size of the dust.According to the current identification method, if the amount of light reflected when the dust passes through is large, then the particles are large, the hair is small, then the particles are small.Thus, by the mid-1990s, air purifiers were able to measure air quality in terms of both smell and dust.

LD13C Laser PM2.5 Dust Sensor Model
LD13C Laser PM2.5 Dust Sensor Model

Dust sensor selection recommendation

A high-quality dust sensor can make the air purifier in ambient air quality is lower than the standard reacted quickly, for dust sensor module choice LUFTMY recommend this latest research and development of PM2.5 LD13C laser dust sensor, the detection module adopts spherical mie scattering principle, zero false alarm rate, small volume, shell software anti-jamming algorithm combining with shielding, anti-interference performance is stronger, precision measurement used in air purifier.

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