What does oxygen sensor do in monitoring air quality?

Types and Principles of Oxygen Sensors

1. Oxygen Cell

Oxygen cells utilize a chemical reaction to measure the partial pressure of oxygen. At the cathode, oxygen combines with electrons to form hydroxide ions. At the anode, hydroxide ions lose electrons to form oxygen. By measuring the current or voltage, the concentration of oxygen can be deduced.

2. Fluorescent Sensors

Fluorescent sensors utilize a fluorescent substance that interacts with a specific wavelength of light to produce an excited state. When the photoexcited state returns to the ground state, light of another wavelength is emitted. By measuring the change in this light, oxygen concentration can be detected.

3. Quartz Vibration Sensor

Quartz vibration sensors utilize the piezoelectric effect of quartz crystals to detect vibration frequencies. When the surrounding gas changes, the vibration frequency of the quartz crystal will change, and the oxygen concentration can be detected by measuring this change.

4. Magnetic Float Sensor

The magnetic float sensor utilizes the displacement of the magnetic float in the magnetic field to detect the oxygen concentration. When the surrounding oxygen concentration changes, the displacement of the magnetic float will change, and the oxygen concentration can be detected by measuring this change.

Oxygen Sensor Applications

1. Environmental Protection

（1） Air quality monitoring: Oxygen sensors are widely used to monitor indoor and outdoor air quality, especially in those areas sensitive to air pollution. They can provide timely warning of the presence of pollutants, such as CO, NOx, etc., and help environmental protection agencies and the public understand the air quality situation and take necessary measures.

（2）Water Quality Monitoring: In the field of wastewater treatment and environmental protection, oxygen sensors are also used to monitor the dissolved oxygen content in water to ensure healthy water quality. This helps maintain the ecological balance of aquatic life, prevent pollution and promote sustainable development.

2. Healthcare

（1）Respiratory Analysis: In the medical field, oxygen sensors are used for respiratory analysis to monitor the oxygen content of a patient's breath. This is important for evaluating the patient's respiratory function, diagnosing respiratory diseases, and monitoring the treatment process of critically ill patients.

（2）Medical Diagnostics: Oxygen sensors are also used in medical diagnostics, especially those related to the respiratory and circulatory systems. For example, by monitoring the oxygen saturation in a patient's blood, it helps to assess cardiopulmonary function, predict changes in medical conditions, and provide a more accurate treatment plan for the patient.

3. Scientific research

（1）Geo-Atmospheric Research: In Geo-Atmospheric Research, oxygen sensors are used to monitor the oxygen content of the atmosphere. This helps to study the formation, evolution and future trends of the Earth's atmosphere and provides important data for environmental protection and climate change studies.

（2）Biological research: Oxygen sensors have a wide range of applications in biological research, especially in the study of biological respiration, energy metabolism, and environmental impacts on organisms. For example, monitoring the oxygen consumption rate of aquatic organisms can assess their growth status, reproductive environment, and ability to cope with environmental stress.

4. Other applications

（1）Combustion control: Oxygen sensors are important for combustion control in industrial production and heating equipment. By monitoring oxygen levels, the combustion process can be controlled to improve energy efficiency and reduce pollutants from combustion.

（2）Gas Detectors: Oxygen sensors can be used as part of a wide range of gas detectors for the detection and identification of various hazardous gases. For example, oxygen sensors can be used in combination with other sensors to detect and analyze the composition of gases in buildings, mines, and other locations to prevent hazardous situations.

The specific role of oxygen sensors in monitoring air quality

1. Monitoring indoor air quality

Oxygen sensors can monitor the oxygen content in indoor air to help people understand the indoor air quality and prevent the occurrence of hypoxia or oxygen enrichment, thus protecting people's health.

2. Monitoring outdoor air quality

By installing oxygen sensors in the outdoor environment, the oxygen content in the air can be monitored, and other harmful gases, such as CO, NOx, etc., can also be detected in time, providing timely and effective data support for environmental protection and public health.

3. Predicting and assessing the degree of air pollution

Oxygen sensors can monitor the content of pollutants in the air in a timely manner, especially for the monitoring of harmful gases, which can predict and assess the degree of air pollution and determine its potential impact on the environment and human health.

4. Provide air quality data to take appropriate measures to improve the quality of life

By monitoring air quality, oxygen sensors can provide relevant data and suggestions to help people take appropriate measures to improve the quality of life. For example, avoiding highly polluted areas, enhancing ventilation, etc., so as to protect people's health and environmental quality.