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What are the dust sensors? Some basic principles of dust sensor

Update: 2019-09-24 16:58 Source: LUFTMY Reading: ↻ News
 

Dust sensor is a kind of sensor device which uses optical method to measure the characteristics of micro particles suspended in gas or liquid media. It has the characteristics of non-contact measurement with optical measurement technology and no disturbance to the measured object.

Characteristics of Dust Concentration Sensor

1. Dust sensor can sense smoke and pollen produced by tobacco, house dust and other small particles more than 1 micron.

2. Small size, light weight, easy to install;

3. 5V input circuit for signal processing;

4. The built-in airflow generator can attract the external atmosphere by itself;

5. Dust sensor is easy to maintain and can maintain its characteristics for a long time.

Principle of Dust Concentration Sensor

Particles and molecules will scatter light under the irradiation of light, and at the same time absorb part of the energy of irradiated light. When a beam of parallel monochromatic light enters the measured particle field, it will be affected by scattering and absorption around the particle, and the light intensity will be attenuated.In this way, the relative attenuation rate of incident light passing through the measured concentration field can be obtained.The relative attenuation rate can basically linearly reflect the relative concentration of dust in the field to be measured.The magnitude of light intensity is directly proportional to the intensity of the electro-optical signal, and the relative attenuation rate can be obtained by measuring the electro-optical signal.

Application of Dust Concentration Sensor

Dust sensors are widely used in atmospheric measurement, fire, smoke measurement and other fields. It can also be used to detect the breakage of all kinds of dust collectors, to measure the dust removal efficiency of all kinds of dust collectors, and to detect indoor air, such as air purifiers, etc. to provide reliable signals for automatic control in these fields.

Air purifier with built-in dust concentration sensor
Air purifier with built-in dust concentration sensor

What are the dust sensors?

Infrared gas sensor manufacturer LUFTMY dust concentration sensor HPD05 uses the principle of optical scattering to measure the dust concentration in the detection range through the conversion of optical path and circuit. The dust concentration sensor HPD05 has the characteristics of small size, high precision, low power consumption, short response time and stable operation under high dust concentration. The air quality sensor can be used in air purifier, air conditioner with purification function, PM2.5 detector, etc.

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

Laser air sensor LD11 is a high precision particle  sensor based on laser Michaelis MIE scattering theory. It can continuously collect and calculate the particle concentration distribution, and output it in the form of universal digital interface. Laser air sensor LD11 has the characteristics of small size, high precision, strong anti-interference ability, low power consumption, long life, short response time of zero error alarm rate, etc. LD11 can be embedded in various instruments or environmental improvement equipment related to suspended particulate matter concentration in the air to provide timely and accurate concentration data.

LD11 Laser dust sensor
LD11 Laser dust sensor

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