Comparison of measurement range ranges for various oxygen content analyzers
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The measurement range of the oxygen content analyzer depends on the actual operating conditions of the oxygen concentration to be measured. A suitable oxygen analyzer needs to be able to accurately measure the oxygen concentration. Oxygen is the gas in the air that is second only to nitrogen in abundance, accounting for about 20.9% VOL of the air’s volume. Due to its oxidizing properties, oxygen readily undergoes chemical reactions with reducing gases, and it exhibits excellent flammability-enhancing capabilities. When certain reducing, flammable gases are within the explosive range and there is an adequate supply of oxygen to support combustion, an explosion can occur once the temperature required for combustion is reached. Therefore, to prevent hazards, it is necessary to install and use oxygen concentration monitoring devices to measure the oxygen concentration in equipment and pipelines. The common oxygen concentration analysis instruments include the following: 1. Online laser oxygen analyzer: This type of oxygen analyzer uses tunable diode laser absorption spectroscopy (TDLAS) to measure oxygen concentration within two range intervals of 0~5% VOL and 0~25% VOL. It has a resolution of 0.01% VOL and an accuracy error of ≤±1% F.S. 2. Pump-action portable micro-oxygen analyzer: This oxygen analyzer uses the electrochemical (ECD) principle to measure oxygen concentrations within the ranges of 0.00–1000 PPM and 0–5% VOL. It has a resolution of 0.01 ppm and an accuracy error of ≤±2% F.S. 3. Explosion-proof online paramagnetic oxygen analyzer: This type of oxygen analyzer operates on magnetic-mechanical principles and is capable of measuring oxygen concentrations within four range levels: 0-5%, 15%, 30%, and 100% VOL. It has a resolution of 0.1% VOL or 0.01% VOL and an accuracy error of ≤±1% F.S. 4. Online zirconia oxygen content analyzer: This type of oxygen analyzer utilizes the zirconia principle to measure oxygen concentrations within two ranges – 0.01–25.00% VOL and 5% VOL–25% VOL. It has a resolution of 0.01% VOL and an accuracy error of ≤±1% F.S. 5. Online trace oxygen analyzer: This type of oxygen analyzer uses the electrochemical (ECD) principle to measure oxygen concentrations within four range levels: 0-1, 0-10, 0-100, and 0-1000 ppm. It has a resolution of 0.1×10-6 and an accuracy error of ≤±1%F.S. Different types of oxygen concentration analyzers vary in measurement range, resolution, and accuracy error, and are suitable for different application scenarios. Furthermore, oxygen analyzers that employ different method principles also exhibit certain differences in data standards.
Oxygen content analyzers are used to measure the concentration of oxygen in gases. Their measurement ranges vary depending on the application environment and requirements, and they can be classified into the following categories: 1. Online laser oxygen analyzers: – Range: 0~5%VOL and 0~25%VOL – Resolution: 0.01%VOL – Accuracy error: ≤±1%F.S. 2. Pump-driven portable trace oxygen analyzers: – Range: 0.00～1000PPM and 0~5%VOL – Resolution: 0.01ppm – Accuracy error: ≤±2%F.S. 3. Explosion-proof online paramagnetic oxygen analyzers: – Range: 0-5%, 15%, 30% and 100%VOL – Resolution: 0.1%VOL or 0.01%VOL – Accuracy error: ≤±1%F.S. 4. Online zirconia oxygen content analyzers: – Range: 0.01～25.00%VOL and 5%VOL~25%VOL – Resolution: 0.01%VOL – Accuracy error: ≤±1%F.S. 5. Online trace oxygen content analyzers: – Range: 0-1, 0-10, 0-100 and 0-1000ppm – Resolution: 0.1×10?? – Accuracy error: ≤±1%F.S. Different types of oxygen content analyzers are suitable for various applications such as purity monitoring, industrial process control, and safety protection. When making a purchase, it is necessary to determine the appropriate range and technical specifications based on the specific application requirements and the actual range of oxygen concentration. At the same time, oxygen content analyzers based on different principles will also differ in terms of performance, response time, and stability; it is necessary to understand their characteristics and operating procedures in detail before use to ensure accurate measurement results. .
When selecting an oxygen analyzer, the following aspects need to be considered: 1. Measurement range. The first thing to take into account is whether the oxygen analyzer can cover the range of oxygen concentrations that need to be measured. Oxygen analyzers usually have different measurement ranges, and it is necessary to choose one based on the actual measurement requirements. If it is necessary to measure gases with low oxygen content, an oxygen analyzer with high sensitivity is required; whereas if measuring gases with high oxygen content, an oxygen analyzer with a wide measurement range is needed. 2. Measurement accuracy: The measurement accuracy of the oxygen analyzer is also a very important factor to consider. In actual production, even minor changes in oxygen content can affect the quality and quantity of the product; therefore, it is necessary to use oxygen analyzers with high accuracy. Generally speaking, the higher the accuracy of an oxygen analyzer, the higher its price; therefore, it is necessary to select an appropriate oxygen analyzer based on actual needs in order to achieve the best economic efficiency. 3. Measurement methods: Oxygen analyzers come in various measurement methods, including electrochemical, infrared, and photoelectronic technologies. Different technologies have their own advantages and disadvantages, and the choice should be based on the actual circumstances. For example, electrochemical oxygen analyzers are commonly used for high-precision measurement of oxygen concentration, while infrared oxygen analyzers can measure high concentrations of oxygen quickly and accurately. 4. Equipment stability: The oxygen analyzer needs to be able to operate stably under various environmental conditions. This relates to the interference resistance and reliability of the instrument. In industrial production environments, complex gas conditions often exist, such as high temperatures, high humidity, and corrosive gases; therefore, it is necessary to use oxygen analyzers with high interference resistance. Furthermore, choosing an oxygen analyzer with high reliability can effectively reduce maintenance and replacement rates, while also ensuring production efficiency and product quality. 5. Ease of use: Generally, it is better to choose an oxygen analyzer that is simple to use, easy to operate, and offers multiple options for adjusting interface parameters.
When selecting an oxygen analyzer, the following factors need to be considered comprehensively: 1. Measurement range: When choosing an oxygen analyzer, the first thing to consider is whether its measurement range meets the requirements of the application scenario. For measuring low oxygen levels, a highly sensitive analyzer is required ； For environments with high oxygen levels, an oxygen analyzer with a wide measurement range is required. 2. Measurement accuracy: Select an oxygen analyzer with the appropriate level of precision depending on the accuracy requirements of the measurement. High-precision oxygen analyzers can be expensive, so a balance needs to be struck between budget and requirements. 3. Measurement methods: There are various measurement techniques available on the market, such as electrochemical, paramagnetic, infrared, laser absorption spectroscopy (TDLAS), zirconia, etc. Each technique has its advantages and disadvantages, and it is necessary to choose the most suitable measurement method based on the specific usage environment and requirements. 4. Equipment stability: Under harsh industrial conditions, the stability of the equipment is crucial. The stability of the equipment in environments with high temperatures, high humidity, corrosive gases, or other interfering gases must be taken into consideration. 5. Ease of use: The simplicity of operation and its user-friendly design are also important factors to consider when making a choice. An easy-to-operate and easy-to-maintain oxygen analyzer can significantly reduce operational difficulties and maintenance costs. 6. Response time: The response times of different types of oxygen analyzers vary significantly. Select an oxygen analyzer with an appropriate rate of response based on the rapid changes in the treatment process and control requirements. 7. Cost: Both the purchase cost and operating costs (such as maintenance, calibration, and replacement of consumables) should be taken into consideration when selecting an oxygen analyzer. 8. After-sales service: Choose brands and suppliers with excellent after-sales service to ensure timely and effective support in case of any issues during use. Taking all the above factors into account, selecting the most suitable oxygen analyzer not only ensures measurement accuracy and stability but also improves overall operational efficiency and cost-effectiveness. .