Views:0 Author:Site Editor Publish Time: 2020-09-01 Origin:Site
We all know that the chemical nature of ozone is extremely lively. Its energy when it is free can produce strong oxidation in an instant, which can be sterilized, disinfected, and detoxified. It is widely used in water plant sterilization, tableware disinfection, indoor air purification, fruit and vegetable preservation, There are also medical treatments; however, if the ozone concentration is too high, it will cause huge harm to human health. Therefore, whether it is the strong oxidizing property of ozone or the prevention of its harmfulness, it is inseparable from the monitoring of ozone concentration . The role of ozone air tester can not be ignored.
What’s the definition of ozone air tester?
What’s the principle of ozone air tester?
What are the characteristics of the ozone air tester?
An ozone air tester is a device that converts information such as the composition and concentration of ozone gas into information that can be used by persons, instruments, computers, etc. The ozone air tester adopts the principle of ultraviolet absorption method, uses a stable ultraviolet light source to generate ultraviolet light, and uses a light wave filter to filter out other wavelengths of ultraviolet light, and only allows the wavelength of 253.7nm to pass. After passing through the sample photoelectric sensor and then through the ozone absorption cell, it reaches the sampling photoelectric sensor. By comparing the electrical signals of the sample photoelectric sensor and the sampled photoelectric sensor, and then by the calculation of the mathematical model, the size of the ozone concentration can be obtained.
The detection principle of the ozone air tester includes the semiconductor principle (E2V in the UK), the principle of electrochemical detection, and the principle of ultraviolet light method. Among them, the most widely used is the principle of ultraviolet light method. The ozone air tester uses the principle of ultraviolet photometry to measure ozone. When the air sample enters the gas path system of the instrument at a constant flow rate, the sample air enters the absorption cell alternately or directly or passes through the ozone scrubber and then enters the absorption cell. Ultraviolet light has characteristic absorption, zero air sample, the light intensity detected by the photodetector when passing through the absorption cell is I0, the light intensity detected by the photodetector when the ozone sample passes through the absorption cell is I, and I/I0 is the transmittance. After each cycle, the instrument's micro-processing system calculates the ozone concentration according to Lambert-Beer Law.
1. The first thing is to ensure the stability of the ozone air tester
Stability is our primary consideration. The smaller the zero offset and the full-scale offset, the better.
Ozone air tester should be convenient
On the premise of stability, convenience is also a factor that must be valued. Light weight, small size, easy and comfortable wearing, and easy maintenance.
2. Applicability of ozone air tester
The technicians identify and evaluate the hazardous gas in a certain space operation site to determine whether the sensor of the selected detector meets the use requirements.
3. The ozone air tester must have reliability
The longer the sensor life, the better. Generally speaking, the sensor life is at least 2 years, and the flammable gas sensor is 2 to 5 years.
4. Understand the protection requirements of ozone air tester
Whether the explosion-proof safety level is suitable for the workplace, whether the product safety has been certified, and whether there is an explosion-proof certification or measurement certificate. Ozone air tester should be easy to identify.Whether the display area is large enough, the font is clear, the alarm sound is large enough, and the alarm flashing light can be recognized from various angles
when buying an ozone air tester, first of all, we must clarify the definition and working principle of the ozone air tester, clarify the characteristics of the use environment and the purpose of use, and select the appropriate ozone air tester.