China is rich in coal resources, but the mining conditions are complex and natural disasters are serious. Driven by the current strong demand in the coal market, some coal mines have the phenomenon of surprise production or blind overproduction, resulting in a high incidence of mine safety accidents in recent years. In order to ensure the safe production of coal mines, in addition to further strengthening the awareness of coal mine safety management, the key is to establish coal mine underground safety monitoring, so that there is a reliable underground safety early warning mechanism.

An important part of coal mine safety monitoring is the detection of mine climate conditions. If the mine weather conditions deteriorate, it will cause great harm to the life safety and health of underground workers, so we must attach great importance to it. In order to protect the health of underground workers and ensure safe production, the quality of mine air must meet the requirements, and good mine climate conditions must be created. And CO2 is an important gas in mine detection, when CO2 is too high, it will cause people to feel headache, tinnitus, limb weakness and so on. Even breathing difficulties and unconsciousness may occur, directly affecting the underground mining work.

The mine personnel can carry hand-held instruments, which is convenient for quantitative analysis of each measurement content, in order to master its dynamic change law, and provide timely on-site data and information for commanding production, so as to take preventive measures in advance.

The small-volume standard φ20 probe NDIR infrared CO2 sensor of GSS, which is represented by our company, has low cost, ultra-low power consumption (5mW) and wide range, which is very suitable for handheld watches and portable instruments.

Sensor parameters:

Preheating time        

Working environment 0 ℃ ~ 50 ℃ (standard) 0 ~ 95% RH, non-condensation

Storage temperature        -30℃ ~ +70℃

Measurement range 0-5%， 0-20%， 0-60%， 0-100%

Accuracy ± 70ppm or +/-5% of zui

non-linear degree

Working pressure range    950mbar~ 1050mbar

Response time 10 seconds to 3 minutes, reading twice per second

Power Input 3.25V to 5V(3.3V recommend)

Peak current 33mA, average current

Power consumption            3.5mW