Generally speaking, the tunnel is the place where vehicles travel. People will not think of the existence of toxic and flammable gases in the tunnel. It is true that there are almost no toxic and flammable gases in the completed tunnel, but toxic, harmful and flammable gases exist during the construction process.

Toxic and harmful gases in the tunnel construction has been the main source of danger, toxic and harmful gases in tunnel construction, from the coal seam, rock and tunnel surrounding rock escape the general name of all kinds of harmful gases. Is a large number of plant deposits buried in the depths of the ground, in the absence of oxygen by the formation under the action of high temperature and high pressure in the process of metamorphic carbonization of coal produced. Toxic and harmful gases usually exist in the form of air pressure bags, when the air pressure bag is punctured(Such as drilling), due to steady infiltration, severe emission or sudden influx, toxic and harmful gases will appear in the excavation area: with certain geological disturbances, toxic and harmful gases will also be generated in the form of strong outbreaks (usually containing a large amount of coal dust). In addition, the tunnel is affected by the large temperature difference between indoor and outdoor for a long time, the air is not circulated, and the humidity is high. Toxic and harmful gases are easy to accumulate. If the construction is improper, major safety accidents will easily occur. The harmful flammable gases in the tunnel are mainly methane, carbon monoxide, hydrogen sulfide, heavy hydrocarbons and trace rare gases.

So how to avoid the construction process due to gas caused by the safety accident? Of course, in the construction process to know the environment in the concentration of toxic and harmful gases, to reach a dangerous level before the evacuation of the site, such as follow-up treatment, to meet the safety conditions to continue construction. Of course, in addition to detecting toxic and harmful gases, we must also detect oxygen concentration. After all, we cannot survive without oxygen.

A fixed gas detector is installed in the tunnel to monitor the concentration of related gases in the tunnel in real time. According to the actual situation, safety accidents caused by toxic and harmful gases can be avoided and the life safety of the staff can be maintained.

Here, we recommend some excellent performance of the relevant sensors used to detect the gas concentration in the tunnel.

KESeries oxygen sensor

KESeries (CP-12/H-25/H-50) The oxygen sensor is a unique galvanic cell type oxygen sensor. Its distinctive features are long service life, excellent chemical stability, andCO2Interference and influence.KESeries sensors were developed to meet the growing demand for oxygen detection in various industries.

Combustible gas sensor

TGS6814It is a catalytic combustion gas sensor that can detect100%LELThe lower explosive limit of the level of methane gas. This sensor not only has excellent durability and fast response ability, at the same time, the linear output and the high stability of the output are also its main characteristics.TGS6814The cap has a specially designed filter layer inside, making it very low cross-sensitivity to organic vapors. In addition, the sensor is more resistant to silicon compounds and is more adaptable to harsh environments.

In addition, our company also has excellent hydrogen sulfide and carbon monoxide sensors. Please consult for details.http://www.apollounion.com/