We know that there is a lot of gas in the mine, in which some gases are very deadly, so it is also dangerous to take samples of them, let us see how the samples are taken from the sealed area. To take a sample, the glass sampling bottle is thrust on one side by a rubber groove with the nipple of the pipe engaged in the stopping and on the other by a suction pipe. After running the pump after opening the pipe wall of the sampling sample, the air inside the sample is filled in the bottle. Then the sampling pipe wall closes. Put a lid in the mouth of the bottle and write the stopping number, date, time, and name of the sample taker on the outside paper.
It is okay to take such a sample between 12 am and 2 pm because the air pressure is low at that time and the gas tries to get out of the sealed area. And the sample gets right. This process has to be done very carefully because if there is any mistake, then the sample starts to say wrong. Only the mining engineer does this work. Because not everyone has the right to check the gas.