Gain a deeper understanding of the technical principles of VOC gas detectors
VOC gas detector is a device used to detect toxic and harmful organic gases. It is used in industry to ensure the standardization of gas emissions by enterprises and meet national environmental protection requirements. So, what is the working principle of this instrument? Let's talk about it in detail below.
In fact, VOC gas detectors have two working principles, one is a photoionization detector, and the other is a flame ionization detector. Compared to the two detection principles, photoionization detectors have higher accuracy, but they have higher procurement and maintenance costs, are inconvenient to carry, and cannot provide data at the time. The photoionization detector generates ultraviolet light by using an ion lamp to irradiate or bombard the target gas. When the target gas absorbs enough ultraviolet energy, it will be ionized. By measuring the small current generated after gas ionization, the concentration of the target gas can be well measured.
Product features of VOC gas detector:
Accurate measurement: Most large range VOC testers on the market are very inaccurate when detecting small data. For example, a detector with a range of 2000PPM may not accurately detect values within 100PPM and may not respond within 20ppm. The detection instrument with a range of 200ppm is very inaccurate when detecting 0.01~10PPM. Even undetectable. The PV6001 uses a 24 bit accuracy ADC foreign chip, combined with some common planning, that is, using a 2000PPM sensor, it can accurately measure VOC gas within 0.1-10PPM, greatly improving the reliability and accuracy of the VOC gas tester.
Inspection format: Many enterprises have multiple workshops that require VOC testing, using traditional VOC detectors and requiring manual and note taking of each measurement result; PV6001 adopts the Microsoft Windows intelligent handheld system channel, with strong software functionality. It can directly see the calculation results and specific data of each workshop on the handheld, and can also be checked with a computer.
Policy gas and CF coefficient: CF coefficients, TWA, STEL values for over 180 VOC gases built-in It is also possible to customize mixed VOC gases and actively select alarm values for multiple gases. Alarm threshold: calculate and select TWA STEL based on the policy gas, and generate a first level alarm and a second level alarm.
Air is the source of life, and whether it is animals, plants, or humans, they cannot do without air. With the development of industry, humans continuously emit harmful substances in production and life, polluting the air and adding harmful components to the air. These harmful gases can have serious effects on the respiratory, immune, nervous, and hematopoietic systems of humans, leading to various diseases. In recent years, most cities and regions in China have been shrouded in smog, and air quality issues have become increasingly urgent. The prevention and control of air pollution have become increasingly important. Gas monitoring is the foundation of environmental protection work, and real and effective environmental monitoring data is the support and guarantee of environmental decision-making and management.
