As winter approaches, smog becomes more frequent, and air pollution problems occur from time to time. In this invisible "battle to protect our breathing," an innovative technological product is quietly changing the way we perceive air quality. According to surveys, pollutants contribute as much as 21.5%-28.4% to particulate matter in autumn and winter, becoming the primary source of air pollution. Faced with this challenge, the MS-GM5B VOC gas sensor has emerged, providing a precise and effective technical means for air quality monitoring.

MS-GM5B VOC gas sensor

How the MS-GM5B Sensor Accurately Detects Air Pollution Hazards

    The MS-GM5B MEMS VOC gas sensor utilizes advanced MEMS technology, fabricating a micro-hotplate on a Si substrate. Its gas-sensitive material is a metal-oxide-semiconductor (MODS) material with low conductivity in clean air. When the sensor is exposed to a VOC-containing gas environment, its conductivity changes with the gas concentration—the higher the gas concentration, the higher the sensor's conductivity. This characteristic allows for the conversion of conductivity changes into an output signal corresponding to the gas concentration using a simple circuit, enabling accurate VOC detection. This sensor can detect VOCs in the range of 1-500 ppm, including various harmful substances such as ethanol, formaldehyde, and toluene, meeting most indoor and outdoor air quality monitoring needs.

Product Advantages

    ①The MS-GM5B sensor utilizes MEMS technology, featuring a robust structure and excellent shock resistance. Its compact size and extremely low power consumption make it ideal for integration into various devices.

    ②Compared to traditional sensors, the MS-GM5B offers several significant advantages: high sensitivity ensures detection of low concentrations of VOCs; rapid response and recovery characteristics enable real-time monitoring; and a simple driving circuit significantly lowers the barrier to entry.

    ③With power consumption below 50mW and dimensions of only 5×5×1.55mm, it is ideal for consumer electronics applications such as mobile phones and computers, and can also be widely used in indoor air quality monitoring, exhaled gas detectors, and indoor smoke alarms.

Applications

    In the consumer electronics field, the GM-502B can be integrated into devices such as mobile phones and computers, allowing users to monitor ambient air quality in real time and avoid environmental pollution.

    In the professional monitoring field, this sensor can be used in indoor air quality monitoring systems to detect harmful gases such as formaldehyde and toluene, and can also be used in exhaled gas detectors and indoor smoke alarms.

    In urban environmental monitoring, similar technology has been applied in Beijing. Beijing has developed an online atmospheric VOCs monitoring device based on sensor technology, achieving real-time online monitoring of total non-methane hydrocarbons and key components of environmental VOCs, with low cost, small size, and high accuracy.

    This type of equipment has been deployed in typical industrial parks and road sections, providing important data support for studying VOCs emission characteristics and their correlation with particulate matter concentration.

    With the continuous advancement of sensor technology, air quality monitoring is developing towards a grid-based, high-precision, and real-time approach. From individual sensors to urban monitoring networks, this technology is weaving an invisible protective net to safeguard the respiratory health of every citizen.