Principle of measurement
CO, CO2, H2S, O2, SO2, NH3 and other test tube of the basic determination of the principle of linear colorimetric method, that is, the measured gas through the test tube and the indicator glue occurred color reaction, the formation of color layer (color column), color layer length And the measured gas concentration is proportional to.

Storage conditions
This product should be kept in a cool dry place, is strictly prohibited sunlight, save the temperature does not exceed 40 ℃, glass products, carefully put.

test methods
All kinds of test tube can be used with CZY-50 gas test tube cylinder positive pressure sampler and other supporting the use of.
After the sampler is rinsed with air, take a certain volume of field air, cut the ends of the test tube, and connect the lower end of the test tube (one end of the concentration scale "0" with a short hose to the sampler ) On the outlet, according to the provisions of uniform time through the test tube, and then according to the test tube color column (or color ring) on the top of the number of instructions directly read the measured gas concentration.