Particle Counter is performed using light scattering principle counting dust test equipment dedicated air particle size and distribution of particles of dust particles. For light scattering and particle size, light wavelength, particle refractive index and the absorption characteristics of light particles and other factors. However, in terms of scattered light intensity and particle size, there is a basic law, is the intensity of the scattered light of fine particles with increased surface area of particles increases. Such constant flow of dust-laden gas through a bundle of light, the particles emit scattering light, is projected through the condenser lens onto a photomultiplier tube, light pulses into electrical impulse, the number of particles determined by the number of pulses. The derived function of the particle diameter and a particle strength of the particles scatter light. So long as the measured intensity of the scattered light can infer the size of the particles, it is the basic principle of a light scattering particle counter.
Further particle counter evolved by the microscope, through the microscope, settling legs, settlement gauge, centrifugal sedimentation meter, particle counter, air laser particle counter, condensation nucleus particle counters, multi-functional multi-channel particle counter and other processes. It is set by the state measuring instruments in use for some time, the optical system and the detection system will change, such as aging of the light source, the light emission efficiency is lowered or dislocation focusing lens is contaminated, so that the conversion sensitivity change machine. Accordingly basis having required JJF1190-2008 "particle counter calibration specification" periodic environmental test center calibrated annually, and according to a calibration certificate issued by the various legal aspects of the instrument are adjusted to obtain the best working condition. Xiao Bian said particle counters related applications under the Mining network to monitor the clean room, for example:
Air cleanliness level table
NOTE: For air cleanliness class 100 clean room is greater than 5 microns equal to the calculated dust particles should be sampled multiple times. When it appears more than once, it means that the test of value is *.
The clean room air cleanliness level of the test, the number of dust particles should be tested under dynamic conditions is based. Test clean room air cleanliness, should be consistent with the provisions of Appendix II.
From the above chart as society progresses, the industrial system has continued to improve, more and more people began to pay attention to the work environment, good clean working environment not only enhance employee productivity while protect the health of employees, and also clean workshop can indoor temperature, cleanliness, chamber pressure, gas flow rate and air distribution, noise vibration and lighting, static control within a range of needs, i.e. regardless of a change in external air conditions, which can all have room to maintain performance characteristics set originally required cleanliness, temperature, humidity and pressure. Currently, clean technology has been widely used in various industries or other environmental controls required to prevent particle contamination, microbiological contamination, due to the difference between a big gap between the industry and requirements, content control environment, indicators are not the same.
Handheld particle counter is widely used in the clean room, the clean room used to test the degree of cleanliness. Air cleanliness level table we can see the air dust particles several microns in four levels, and therefore when sampling in the workshop, the air suspended particles in the presence of various forms, animal dander, plant pollen, air planktonic bacteria, and some particulate matter. In order to more accurately identify and diagnose information obtaining particle contamination in the environment, to determine whether the factory a clean room environment to meet cleanliness rating must be used if the dust particle counter.
Providing the Mining Network Release Particles Plus new generation hand-held measuring particle counter 8206 ranges from 0.2 microns to 10 microns, flow 0.1 cubic feet (2.83 liters) / minute. Easy to set up, six user-selectable particle channel, and the temperature and relative humidity up data. View generated on the screen ISO14644-1, EU GMP Annex 1 and FS 209E reports, or through the printer, USB flash drives, general-purpose output options to export via real-time data to the Particles Plus download software.
Particles Plus particle counters can be controlled and monitored through a Web browser. 8206 particle counter has a concentration mode, up to a concentration of approximately [mu] g / m ³ ensures analysis have pulse comes.
Another addition to 8206, Particles Plus there are three different models handheld particle counter detection range of different channels -8303,8306,8506, in order to meet the needs of customers, also introduced a number of remote particle counter for remote real-time monitoring of the clean room Happening.