How to view the precise measurement of particle size by laser dust particle counter?

At present, there are more and more customers applying laser dust particle counters. Dust particle counters are widely used in the fields of pharmaceuticals, electronic devices, precision machinery and equipment, color tube production and manufacturing, microbial strains, etc., to complete the supervision of the actual purification effect and cleaning level of various cleaning levels of operation consoles, purification treatment rooms, and purification workshops, in order to ensure the quality of equipment.
Laser dust particle counter is an instrument and equipment used to accurately measure the total amount and particle size distribution of dust particles in the air, providing a basis for the identification of gas cleanliness. The common laser dust particle counter is the light transmission type (DAPC), which accurately measures particle sizes ranging from 0.1-10 μ m. In addition, there are also condensation core type laser dust particle counters (CNC), which can accurately measure smaller dust particles.

Accurate measurement of particle size is a key key parameter of dust particle counters, as it immediately matches the instrument's sensitivity to changes. The sensitivity of transformation represents the correlation between the operating voltage and particle size of the data signal. After being transformed by the optical system software of the laser dust particle counter, particles with different particle sizes will form pulse data signals with different strengths (working voltage). The larger the particle size, the higher the single pulse working voltage. In other words, the particle size corresponds one-to-one with the working voltage of a single pulse. For example, if the transformation sensitivity of a laser dust particle counter is 0.3 μ m, it matches 69mv, 531mv for 0.5 μ m, 701mv for 1.0 μ m, etc. If the laser dust particle counter detects a single pulse of 100mv, then the particle size undoubtedly exceeds 0.3 μ m and is below 0.5 μ m.
The internal power circuit of the laser dust particle counter is the power circuit that statistically analyzes the total number of pulse generators that are greater than or equal to a certain working voltage value. For the above examples, accurately measuring the total number of particles greater than or equal to 0.3 μ m in the air, in the circuit, is the statistical analysis of the number of single pulses greater than or equal to 69mv, accurately measuring the total number of particles greater than or equal to 0.5 μ m, in the circuit, is the statistical analysis of the number of single pulses greater than or equal to 531mv, and so on.