Nitrogen dioxide detection tube can be quickly detected without any energy or power supply. It has the characteristics of simple operation, convenient carrying, and can detect the content of nitrogen dioxide in the air.

Operating method of nitrogen dioxide detection tube:
Cut the two ends of the detection tube and the oxidation tube, connect the zero end of the detection tube with the rubber tube of the oxidation tube, connect the upper end of the detection tube with the sampler, make the gas sample extract 50 ml in 25 seconds at an average speed through the detection tube, react with the indicator glue, and produce a yellow-green discoloration column, which can read at the upper end of the yellow-green discoloration column.

Type I: 0.0002-0.01%
Type II: 0.001-0.1%
Note: The longer gas detection tube can be customized according to the user's needs.