What is Gas Oxidizing Property Tester?

Oxygen analyzers are common analytical instruments widely used in power generation, boilers, chemicals, semiconductors, water treatment, and biopharmaceuticals. They are not only widely used in heating furnaces, chemical reaction vessels, air separation, industrial nitrogen production, semiconductor industry, centrifuges, biopharmaceuticals and bio-fermentation, and environmental monitoring for detecting oxygen concentration in mixed gases, but also extensively used for detecting dissolved oxygen in boiler water, dissolved oxygen in wastewater treatment plant effluent, and monitoring trace and micro-oxygen levels in ultrapure water. In industries such as petrochemicals, power generation, and steel, various reactors, combustion furnaces, reaction vessels, and centrifuges require online oxygen content monitoring. If the oxygen content reaches a certain concentration, it can easily react with other materials, causing safety accidents. To prevent the formation of explosive mixtures, oxygen concentration monitoring is essential. Currently, commonly used gas oxygen analyzers utilize principles such as paramagnetic oxygen, zirconia, electrochemical, and laser principles.

Versatile Testing Functions

Accelerated Oxidation Testing

Principle: By increasing temperature, pressure, or introducing specific gases, the oxidation reaction of a sample is accelerated, thereby predicting its oxidative stability under normal storage conditions in a shorter time. For example, in the food industry, high temperatures are used to accelerate the oxidation of oils, simulating the deterioration of oils during long-term storage.

Application: In the lubricant industry, it can quickly assess the antioxidant performance of lubricants under harsh conditions such as high temperature and high pressure, helping researchers screen additive formulations with excellent antioxidant properties.

Real-time Monitoring of the Oxidation Process

Principle: Equipped with advanced sensors, such as oxygen concentration sensors and redox potential sensors, it can monitor changes in various physicochemical parameters of a sample in real time during the oxidation process. For example, an oxygen concentration sensor can accurately measure the decrease in oxygen content in a sample, thus reflecting the progress of the oxidation reaction.

Application: In materials science research, real-time monitoring of the oxidation process of polymer materials helps to understand the oxidation mechanism of materials. Researchers can explore the effects of different environmental factors (such as light, temperature, and humidity) on material oxidation by monitoring changes in the concentration of free radicals generated during the oxidation process.

Simultaneous Testing of Multiple Samples

Principle: The instrument typically has multiple testing channels or sample chambers, allowing for the simultaneous testing of multiple different samples. Each sample chamber has independent temperature control, gas supply, and detection systems, ensuring that each sample is tested under identical conditions without interference.

Application: In the field of drug development, this allows for the simultaneous testing of the oxidative stability of multiple drug formulations or active pharmaceutical ingredients. For example, in developing novel anticancer drugs, it is necessary to assess the oxidative stability of drugs in different dosage forms (such as tablets and capsules). The simultaneous testing function allows for rapid comparison of the stability differences between different dosage forms, providing a basis for optimizing drug formulations.

Adaptable to Multiple Sample Types

Liquid Sample Testing

Principle: For liquid samples, such as edible oils, lubricating oils, and chemical reagents, the instrument uses a sealed liquid sample cell. By precisely controlling the sample temperature, stirring speed, and gas environment (such as introducing pure oxygen or air), the liquid sample is allowed to fully contact the gas, promoting the oxidation reaction.

Application: In edible oil quality testing, testing the oxidative stability of edible oils from different brands and processing methods can help consumers choose healthier edible oil products. Simultaneously, food manufacturers can optimize their production processes based on the test results, extending the shelf life of edible oils.

Solid Sample Testing

Principle: For solid samples, such as plastics, rubber, and pharmaceutical tablets, the instrument is equipped with a special solid sample clamp or sample chamber. Generally, by controlling the gas atmosphere and temperature around the sample, an oxidation reaction occurs on the surface of the solid sample. Some instruments can also heat the solid sample to volatilize volatile components, and then test the oxidative stability of these volatile components.

Applications: In the electronics industry, testing the oxidative stability of plastic products ensures that components such as electronic product casings will not experience performance degradation or discoloration due to oxidation during long-term use.

Gas Sample Testing

Principle: For gas samples, such as natural gas and industrial waste gas, the instrument uses a specific gas circulation system to introduce the gas sample into the reaction chamber. Under high temperature or in the presence of a catalyst, it monitors the oxidation of trace amounts of combustible gases in the gas sample, or detects the reactivity of oxidizing gases (such as oxygen) with other components.

Applications: In environmental monitoring, testing the oxidative stability of volatile organic compounds (VOCs) in industrial waste gas helps understand the chemical reactivity of waste gas in the atmospheric environment, providing data support for air pollution control.

In modern industrial production and daily life, gas detectors play a crucial role as important safety equipment. Especially in high-risk environments involving flammable and toxic gases, four-in-one gas detectors have become indispensable "guardians." However, even the most advanced equipment requires proper maintenance to ensure long-term stable operation and effectively extend its service life.

Routine Cleaning and Maintenance

Sensor Cleaning: The sensor is the core component for gas detection, and its accuracy directly affects the detector's readings. Therefore, it needs to be cleaned regularly to ensure its surface is free of dust, oil, and other impurities. When cleaning, a soft cloth dampened with a small amount of alcohol can be used to gently wipe the sensor. However, avoid using cleaning agents or solvents containing abrasive particles to prevent damage to the sensor surface.

Housing Maintenance: The detector's housing should be kept dry and clean to prevent dust and moisture from entering and affecting the circuitry and sensor. A soft cloth can be used to wipe the housing, but again, avoid using solvents, soap, polishing agents, or other chemical cleaning products.

Regular Replacement and Calibration

Filter Replacement: The detector is usually equipped with a filter to purify the air being detected and prevent impurities from interfering with the test results. The filter should be replaced regularly according to the instructions to ensure the accuracy of the detection.

Sensor Replacement: Sensors have a limited lifespan, after which their accuracy and stability will decrease. Therefore, sensors need to be replaced regularly according to the manufacturer's recommendations or industry standards. The lifespan of electrochemical components is typically 2-3 years.

Regular Calibration: To ensure the accuracy and reliability of the detector, regular calibration is required. Calibration should use standard gases and follow the calibration procedures provided by the manufacturer. It is generally recommended to calibrate at least once a year, or recalibrate after the detector has not been used for an extended period.

Storage and Transportation

Storage Environment: The detector should be stored in a dry, well-ventilated environment free of corrosive gases. Avoid prolonged exposure to high temperatures, high humidity, or strong magnetic fields, as this may affect its performance and lifespan.

Transportation Precautions: During transportation, ensure the detector is switched off and properly packaged to prevent collisions and compression. Also, avoid severe vibrations and impacts to prevent damage to the internal circuitry and sensors.

Safe Operation and Maintenance

Avoid Immersion in Liquids: Never immerse the detector in liquids, as this may damage the circuitry and sensors.

Safe Operation: When using the detector, carefully read the instruction manual to ensure correct operation. Avoid use in flammable or explosive environments to prevent accidents.

Regular Inspection: After each day's work, inspect the detector and record the results. Promptly identify and resolve problems to ensure the testing equipment is always in good working order.

Oxygen analyzers and gas detectors are indispensable precision instruments in modern industrial production and daily safety assurance. Their versatility, adaptability to various samples, and the importance of routine maintenance are self-evident. From accelerated oxidation testing to real-time monitoring of the oxidation process, and simultaneous testing of multiple samples, oxygen analyzers demonstrate their wide application value in materials science, food, lubricants, and pharmaceutical development. Gas detectors, especially four-in-one gas detectors, play a crucial role as "guardians" in high-risk environments. Their daily cleaning and maintenance, regular replacement and calibration, safe storage and transportation, and safe operation and maintenance are all key to ensuring long-term stable operation and effectively extending their service life. Therefore, we should fully recognize the importance of these instruments and strictly follow the specifications for operation and maintenance to ensure production safety, improve product quality, and contribute to social harmony and stability.