Update: 2019-12-05 17:06 Source: LUFTMY
The principle of dust sensor is developed according to the scattering principle of light. Particles and molecules will produce light scattering phenomenon under the illumination of light, and also absorb part of the energy of flared light. When a beam of parallel monochromatic light is incident on the particle field, it will be affected by the scattering and absorption around the particle, and the light intensity will be attenuated. In this way, the relative decay rate of incident light passing through the concentration field to be measured can be obtained. The relative attenuation rate can basically reflect the relative concentration of dust in the field to be measured. The intensity of the light is directly proportional to the intensity of the electrical signal converted by photoelectricity. After measuring the electrical signal, the relative attenuation rate can be obtained, and then the dust concentration in the field to be measured can be measured.
Generally speaking, the haze meter of tens of yuan must use the infrared dust sensor. This sensor determines the concentration of dust particles in the air through the luminous rate. The price is very low. Generally, it can only detect large particles in more than ten pieces. If you want to buy a relatively reliable Haze Meter, you should not be too greedy and cheap. Try to choose the laser scattering principle to measure the relatively more accurate one Laser dust sensor.
In 2013, the suppliers on the market were luftmy, seinway, huaman, etc. at home, and Japan Shenrong, Japan sharp, South Korea Sanying, and the United States GE. In 2014, with the rapid development of the industry, the number of suppliers began to increase, and Shenrong began to have some customers to follow up with digital display. Sharp started to put forward the localization of digital display by an agent. Under the advantages of performance and brand, GE's market share The rising has a great impact on Shenrong. As the problem of agency system began to decline, Ge sensor business department sold to Amphenol and lost its brand awareness.
In 2014, the laser dust sensor led by panteng began to ship and quickly occupied the Internet brand of air purification. Among the domestic brands, the plagiarism manufacturers centered in Shenzhen are constantly emerging, such as Zhengzhou Weisheng, nuofen and Sifang. In 2015, the professional downturn, Shenrong sales decline severely, sharp agile added the vacancy of Sanying, and together replaced the Department with digital products The customers of Shenrong and Ge have improved their skills and services in domestic brands, but the market acceptance is still low.
Sps30 launched by Sinovel in 2018 and HPW series particulate matter sensors of Honeywell have good feedback in the market; LUFTMY LD series in Guangzhou, with its advantageous price, excellent product performance and stable supply path, has a rapid increase in the market share of particulate matter sensors in recent years, enjoying an excellent reputation and high influence in the industry.
1.Service life: the service life of the laser emission tube is thousands of hours, and there will be the possibility of sudden failure together. About five thousandths, this is the characteristic of the laser sensor. You need to pay special attention to the service life. The life span of air pump or electric fan is longer than that of laser sensor. As long as the life span of pump is 2000 hours, the life span of electric fan depends on the design and material selection of sensor manufacturer;
2.Accuracy. The advantage of laser sensor is that it can detect more particles in the range of 0.3 ~ 1.0, and the relevant detection results are closer to the real value. Please do not use TSI for direct comparison between quasi and forbidden. Compare with the data of Meteorological Bureau, recommend an app of "air quality index" together, and pay attention to finding the data of the nearest national control point when comparing;
3.Consistency: take 100 sensors in a batch as an example, with an average value of 100ug / m3. To see the proportion of these 100 sensors deviating from 100ug, 10% is qualified, and 5% is excellent. Write so many times when it is convenient for people who don't know the truth to buy purifier products as a reference, and also when it is convenient for engineers of purifier fresh fan manufacturers to design, according to their actual needs, select the most suitable infrared or laser dust sensor for their products.
Dust sensor brand luftmy -- laser particle sensor LD10 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.
Laser dust particle counter LD10 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. the laser dust particle sensor can be embedded in various instruments related to the concentration of suspended particles in the air, such as air detector or environmental improvement equipment, to provide timely and accurate concentration data.