Carbon emission testing project

There are many different types of carbon emission sensors on the market, which are mainly used to monitor the concentration of carbon dioxide (CO₂) and other greenhouse gases. Here are some common carbon emission sensor types and their features:

- **Working Principle**: Use an infrared light source to measure the absorption of carbon dioxide within a specific wavelength range to determine the concentration of carbon dioxide.

- **Features**: High accuracy, short response time and long life, very suitable for indoor air quality monitoring and industrial applications.

- **Application range**: Mostly used in indoor air quality, greenhouses, HVAC systems, etc.

- **Working Principle**: The electrode material undergoes a chemical reaction with the gas to generate a current signal, and the gas concentration is estimated based on the current.

- **Features**: High sensitivity, low power consumption, but relatively short life and requires regular calibration.

- **Application range**: Commonly used in portable gas detectors and indoor air quality equipment, suitable for detecting gases such as CO, NO₂, SO₂, etc.

- **Working Principle**: Gas burns and releases heat under the action of catalyst, and the sensor measures the heat change during the combustion process to determine the concentration.

- **Features**: Good sensing effect for combustible gases, suitable for monitoring flammable organic compounds, but not suitable for direct measurement of carbon dioxide.

- **Application range**: Mainly used for monitoring flammable gases (such as methane and carbon monoxide) in industrial environments.

- **Working Principle**: Use laser technology to accurately identify the specific absorption wavelength of the gas and measure the gas concentration.

- **Features**: Extremely high sensitivity and selectivity, suitable for accurate measurement of long distances and specific gases, but the equipment price is relatively high.

- **Application scope**: Widely used in precision environmental monitoring, industrial emissions, greenhouse gas monitoring and other fields.

- **How it works**: Optical sensors can detect particulate matter such as PM2.5, and can also be used in conjunction with other technologies (such as chemical analysis) to detect gases such as carbon dioxide.

- **Features**: Suitable for air quality monitoring, capable of measuring PM2.5, PM10, temperature, humidity and other parameters simultaneously.

- **Application scope**: Mostly used in air quality monitoring stations, smart cities, smart homes, etc.

- **How it works**: When the sensor is exposed to gas, it changes the conductivity of the semiconductor and the gas concentration is measured based on this change.

- **Features**: Suitable for monitoring some common gases (such as CO, CH₄, etc.), but has poor selectivity for carbon dioxide.

- **Application range**: Commonly used in portable gas detectors and household air quality monitoring devices.

Factors to consider when choosing a carbon emissions sensor:

- **Measurement accuracy**: For applications that require precise monitoring, it is recommended to choose NDIR or laser sensors.

- **Power consumption and lifespan**: NDIR and MOS sensors have relatively long lifespans, while electrochemical sensors have low power consumption.

- **Application scenarios**: For example, industrial environments require high sensitivity and anti-interference capabilities, while air quality monitoring requires the integration of multiple gas and particle monitoring functions.