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Instructions for Use of the Ozone Concentration Detector
When using an ozone concentration detector, the general working principle involves the ultraviolet absorption method. A stable ultraviolet light source is used to generate ultraviolet radiation, and optical filters are employed to eliminate ultraviolet wavelengths other than a specific one, allowing only the 253.7 nm wavelength to pass through. After being sampled by a photoelectric sensor, the light passes through an ozone absorption cell before being re-sampled by the photoelectric sensor. By analyzing and comparing the electrical signals from the two photoelectric sensors—the sample and the reference— and applying a computational learning mathematical model, the ozone concentration can be determined.
Use of the Ozone Concentration Detector:
Use to proceed Ozone Concentration Detector At this point, the basic working principle commonly adopted is the ultraviolet absorption method. A stable ultraviolet light source is used to generate ultraviolet radiation, and optical filters are employed to eliminate other ultraviolet wavelengths, allowing only the 253.7 nm wavelength to pass through. After being sampled by a photoelectric sensor, the light then passes through an ozone absorption cell before being sampled again by the photoelectric sensor. By analyzing and comparing the electrical signals from the two photoelectric sensor samples, and based on computational learning and mathematical modeling, the ozone concentration can be determined independently.
Ozone Concentration Detector Calibration:
The ozone concentration detector has two calibration procedures. The first is instrument calibration: the ultraviolet ozone detector, selected from a distribution of ozone concentration detectors, undergoes comparison at 10 test points. The instrument is considered qualified if the error range is kept within 1%.
Second, we employed the chemical titration method—specifically, the potassium iodide and sodium thiosulfate titration method—which is internationally recognized as a standard chemical teaching technique—to determine ozone concentration. We also selected 10 test points and compared the results obtained from the chemical titration method at these 10 points with those measured by an ozone concentration detector. The error was kept within ±1%.
Ozone Concentration Detector Test:
1. Turn on the central air conditioning; ensure that the air ducts are blowing air into the clean space.
2. Ozone Concentration Detector Enter the cooling water, confirm that the ozone outlet has been connected to either the central air-conditioning supply or return air duct, then turn on the ozone concentration detector. The typical normal startup time is about 1 hour.
The ozone oxidation technique involves impregnating a color-changing reagent onto a carrier material to form a quality-testing tube—a glass tube with an inner diameter designed as a reaction chamber. When in use, the ends of the testing tube can be cut open, and a venting system and appropriate connection method are employed to quantitatively analyze and measure the ozone gas absorbed at the tube's venting end. The ozone concentration is directly proportional to the length of the reagent column within the testing tube, and the concentration value can be read by referring to the calibrated scale.
The above procedures can help us measure ozone concentration. During the operation, we need to be careful to avoid errors that could lead to inaccuracies.
Safety Instructions for the Ozone Concentration Detector:
1. If the gas detector has not been used for an extended period (more than one week), after starting up the instrument and letting it run for a certain period of time (at least 10 minutes), enter the factory-set calibration mode and observe whether the instrument’s reading stabilizes around zero. If the reading fails to return to zero or exhibits significant drift, you’ll need to perform a zeroing procedure once (for oxygen detectors, this means returning the reading to the target point).
2. After the instrument has completed its test, please wait until the readings have dropped before disconnecting the power supply. Before returning the instrument to zero, also wait until the readings have dropped and stabilized before proceeding with any further operations.
3. Receptor locations or densely populated areas—places where ozone gas could pose a threat to humans—this approach is primarily aimed at protecting human health.
4. Leak points or detection points are locations where ozone gas is present and should be as close as possible, because of the chemical nature of ozone’s active wavelength, which makes it prone to decomposition.
5. The installation height of the ozone concentration detector should be below the leak point, because ozone has a molecular weight greater than that of air, and it will diffuse downward from the leak point.
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