Laser Dust Particle Counter is an instrument used to measure the number of dust particles in the air and the distribution of particle size, so as to provide a basis for the evaluation of air cleanliness. Commonly, laser dust particle counters are light scattering (DAPC) type, measuring particle size range of 0.1-10μm, in addition to condensation nuclei type laser dust particle counters (CNC), which can measure the size of smaller dust particles.
The basic principle of the laser dust particle counter is that the detection laser of the optical sensor is scattered by the dust particles and is received by the photosensitive element and produces a pulse signal, which is output and amplified, and then processed by the digital signal processing, and by comparing it with the standard particle signals, the comparison results are expressed in different parameters. The instrument's measurement parameter setting, measurement result display, keystroke, timing, printing, time, date, data storage, etc. are all controlled and realized by the built-in microcomputer (MCU), and the instrument can simultaneously display the temperature and humidity of the environment and monitor and report the working status of the laser particle sensor.
At present the laser dust particle counter user more and more, Laser dust particle counter is widely used in medicine, electronics, precision machinery, color tube manufacturing, microbiology and other industries, to achieve a variety of clean level of the workbench, purification room, purification workshop purification effect, clean level monitoring, to ensure product quality. The following is for the dust particle counter how to choose the type? Specific issues and factors that should be considered:
1. What type of data is expected to be collected? Record this information as a simple pass/fail? Or will the information be recorded in a spreadsheet or database?
2. What type of environment will the particle counter be used in? Will it be used in an ISO Class 3 cleanroom for routine particle counting, or will it be used to validate flow critical processes?
3. Will this particle counter be used to certify cleanrooms and move from one location to another after testing?
4. Does the operator keep the particle counter around, either on the bench in the critical process or mounted on a movable cart?
5. Will the particle counter be used for continuous dynamic cleanroom particle monitoring? Is the particle counter intended to be connected to an environmental monitoring system?
6. Sensitivity: the zui size of particles that can be detected.
7. Counting Efficiency: The ratio of the measured particle concentration to the true particle concentration. Using a more sensitive instrument to measure the true particle concentration, the counting efficiency is 100% at the zui small particle size of the instrument under test. A properly designed instrument should have a counting efficiency of 50%.
8. Zero Count Level or False Count Rate: The amount of particles that are incorrectly reported using filtered air at a zui flow rate for a given amount of time. This is correctly reported as the number of particles per 5 minutes. (The desired zero count rate should be less than 1 count every 5 minutes)
9. Flow Rate: This is the amount of air passing through the particle counter. This is usually expressed in cubic feet per minute. Common flow rates are 1.0 cfm and 0.1 cfm. The higher the flow rate, the larger the pump that pumps the air and the larger the particle counter.
10. Channels: This is the number of "bins" into which the particles fit, based on a calculation of the corresponding size of each particle. Channels are expressed in microns. For example, you may have a 4 channel particle counter. This means that particles can be counted and sorted in 4 different channels. Examples of channels are: 0.1μm, 0.2μm, 0.3μm, 0.5μm, 1.0μm, 5.0μm, ...
CW-HPC600&CW-HPC600A Handheld Laser Dust Particle Counter is a unique combination of handheld and desktop printout of the highly sensitive laser dust particle counter. counter. Its patent-protected design not only leads international similar products in sensitivity, resolution and stability of sensor technology. The unique multi-functional integrated design meets and facilitates the user's needs. It can accurately measure the number and distribution of particles in the environment in real time; various measurement parameters can be set, such as automatic real-time display, particle size selection, timing, delay and automatic repeat measurements, time, and date settings, data storage and printing, counting over the limit of the alarm light function.
CW-HPC600&CW-HPC600A handheld particle counter in accordance with international standards ISO14644-1 design and bilingual display with backlight, novel FPGA technology to ensure that six users arbitrarily set the particle size channel to be measured at the same time for real-time detection of the reliability and accuracy of up to 1,000 groups of sample data can be stored in the built-in flash memory, and through the USB interface. Up to 1000 groups of sampling data can be stored in the built-in flash memory, and through the USB interface to realize high-speed data download. The instrument has high testing accuracy, stable performance, strong versatility, is the quality supervision and other authoritative inspection agencies, ultra-large-scale integrated circuits ultra-clean workshop (room), the electronics industry, health care, food processing, optical or precision machinery and other production enterprises and aerospace and other scientific research departments to detect the purified environment, the cleanliness of the clean room level of the ideal instrument.