The light source is a key component of the laser dust particle counter and has a significant impact on the performance of the instrument. The light source requires high stability, long life and no interference. The source of the laser dust particle counter has two kinds of common light sources and laser light sources. The common light source is an iodine-tungsten lamp, which has a large volume, high heat generation and short life, and needs to be preheated after starting up. The laser light source is a laser, which has small volume, high stability and long service life. It is often integrated with the detection chamber and the photodetector to form a sensor. Common laser sources have
HeNe laser, laser diode. The laser dust particle counter using a common light source has a low response to a particle signal of 0.3 μm or less, and its signal amplitude is almost the same as the noise amplitude of the counter itself, and the signal is difficult to detect from the noise. Such instruments, although labeled with a channel of 0.3 [mu]m, are only suitable for the determination of particles larger than 0.3 [mu]m, especially above 0.5 [mu]m. Due to the good monochromaticity of the laser and the stable and stable light energy, the laser dust particle counter using the laser source has a high signal-to-noise ratio (SNR). Some of these instruments can detect 0.1 μm particles.Shangyu Star Equipment Co., Ltd.
Located in Daoxu Town, Shangyu District, Shaoxing City, Zhejiang Province, it is an enterprise integrating production, product research and development, processing and trade. The company's main products: drying box series, incubator series, laboratory muffle furnace series, distilled water series, as well as clean workbench, air shower, fume hood, biological safety cabinet and other complete purification equipment.
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