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Characteristics of infrared and laser PM2.5 dust sensors

Update: 2019-12-03 16:43 Source: LUFTMY Reading: ↻ News
 

There are many kinds of laser sensors in the market. Different types of laser sensors have their own principles. Laser PM2.5 sensor has the characteristics of universality, miniaturization, accurate data and real-time response. It can be applied to portable instruments, air quality monitoring equipment, air purifier, fresh air ventilation system, air conditioning, smart home equipment and other places.

Air purifier
Air purifier

Infrared dust sensor:

Infrared LED is a kind of light-emitting diode whose emission wavelength is in the infrared section. The common wavelength is about 850nm-940nm, which is widely used in the fields of medical treatment, security, communication, remote control and sensor. Because the wavelength of infrared LED is beyond the visible spectrum, the influence of ambient light on the received signal can be greatly weakened by combining with the receiver of specific spectrum. Thanks to the continuous maturity of infrared LED technology in recent years, infrared LED has the characteristics of long life, high emission efficiency, good monochromaticity and good directivity. This makes infrared LED widely used in sensor field, especially in dust sensor industry.

HPD05 Infrared PM2.5 dust sensor
HPD05 Infrared PM2.5 dust sensor

The infrared dust sensor HPD05 uses the principle of optical scattering to obtain the particle concentration, and measures the dust concentration within the detection range through the conversion of optical path and circuit. The infrared counter counter counter counter sensor hpd05 has the characteristics of small volume, high precision, low power consumption, short response time, stable operation under high dust concentration, etc. the infrared counter counter counter counter counter counter counter sensor can be applied to air purifier, fresh air system, etc.

Laser dust sensor:

Compared with ordinary visible light, laser has the characteristics of high coherence, strong directivity, good monochromaticity and high power density. For example, the light produced by the laser light source is like a chorus, and all people's voices are in the same tone and rhythm; the light produced by the ordinary visible light source is disordered. Therefore, the laser can be focused into a very concentrated parallel beam, and can maintain a small diffusion angle and a high power density over a long distance. Common lasers are generally divided into three categories: solid-state lasers, gas lasers and semiconductor lasers (commonly known as laser LED). In the field of instrument level laser particle counter, helium neon gas laser is generally used as the light source.Laser PM2.5 sensor module ld12 is a high-precision particle concentration sensor based on laser Mie scattering theory. It can continuously collect and calculate the number of suspended particles with different particle sizes in the air per unit volume, i.e. particle concentration distribution, and then convert it into mass concentration, and output it in the form of general digital interface.

LD12 Laser PM2.5 dust sensor
LD12 Laser PM2.5 dust sensor

Laser PM2.5 sensor LD12 has the characteristics of small volume, high precision, strong anti-interference ability, low power consumption, long service life, short response time of zero error alarm rate, etc. this high-quality laser PM2.5 sensor can be embedded in various instruments or environmental improvement equipment related to the concentration of suspended particles in the air, such as fresh air system, air purifier, etc., to provide timely and accurate concentration data.

Structure diagram of laser dust sensor
Structure diagram of laser dust sensor

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