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The existing laser dust sensor used in the coal mine safety monitoring system consumes a large amount of power and cannot effectively transmit data over long distances. Based on the principle of laser dust monitor measurement, this paper designs a laser particle sensor with the main features of low power consumption, long transmission distance, and accurate measurement. It meets the various technical requirements of the coal mine safety monitoring system after upgrading and transformation...

Fresh, clean air is essential for good health. However, indoor air can quickly become stale due to the accumulation of carbon dioxide (CO2) in people's breath. As carbon dioxide levels rise, the potential for pathogens and pollutants increases, causing potential health problems such as dizziness, headaches, and fatigue. According to a study by the Center for Air Infiltration and Ventilation, carbon dioxide levels are a reliable indicator of overall air quality. CO2 sensors play a vital role...

What is an Air Quality Sensor? An air quality sensor is a device used to detect the concentration of pollutants in the air. It can usually measure two or more air quality indicators such as temperature, humidity, carbon dioxide, carbon monoxide, ozone, formaldehyde, benzene, PM2.5, and PM10. It is an important part of air purifier and fresh air system. What is the Measurement Range of Air Quality Sensors? Air quality sensors can usually measure particulate matter such as pm1, pm2.5, pm10, various...

In industrial complexes, volatile organic compounds (VOCs) pose significant hazards, potentially causing nerve and kidney damage to workers exposed to them. Recognizing the serious health risks associated with even low-level VOC exposure, companies are increasingly installing VOC detectors to identify and measure these compounds promptly. To ensure effective safety measures, it is crucial to understand how VOC detectors operate. Here’s a detailed look at VOC detection methods for industrial...

An electrochemical formaldehyde sensor, often referred to as a CHO Sensor, is a crucial device for detecting formaldehyde levels in various environments. Given the harmful nature of formaldehyde and its potential threat to human health, the development of precise and efficient sensors is vital for environmental monitoring and safeguarding well-being. How Electrochemical Formaldehyde Sensors Operate The operation of these sensors hinges on electrochemical reactions and comprises three main components:...

Coal production is constantly improving. A large amount of coal dust is generated during excavation, mining, blasting, transportation, and other processes, seriously polluting the working environment. In environments with high coal dust, workers may inhale the dust for extended periods, causing fibrosis and hardening of lung tissue, loss of normal respiratory function, and ultimately leading to the occupational disease pneumoconiosis. Like gas, coal dust can explode after settling. Therefore,...

The Laser Dust Sensor Module employs optical principles to monitor suspended particles in the air, such as dust and smoke, providing efficient and accurate assessments of air quality. This technology plays a crucial role in identifying and managing potential health risks by analyzing the interaction between laser beams and airborne particles. Working Principle 1. Characteristics of Laser Light Source The laser light source emits monochromatic and highly bright light, which is crucial for accurate...

The established benchmark for assessing indoor air quality is CO2 level measurement. While particulate matter, VOCs, and other contaminants are important, indoor CO2 levels are often used as a proxy for pollutant dilution in densely occupied spaces, indicating fresh air availability. Indoor CO2 levels typically reflect the amount of fresh air entering a building. Higher CO2 concentrations indoors, compared to outdoor levels (350-450 ppm), indicate lower fresh air exchange. CO2, a by-product of human...

All carbon dioxide sensors require calibration to maintain accuracy. This can be achieved by calibrating the sensor to a known gas concentration or using the automatic baseline calibration (ABC) method, each with its own advantages and disadvantages. Most of our CO2 products utilize non-dispersive infrared (NDIR) carbon dioxide sensors. These sensors measure CO2 levels using an infrared light source and detector. Over time, both the light source and detector degrade, leading to slightly lower CO2...