Dear sir、 I would like to get the detector but it should tell me in percent volume cause my boss tell me that it should show the percentage of gas Hydrogen and Cabonmomoxcide over 20%to show that our business take too dangerous for the air pollution or not when we would like to test the air we open the hole that we make on the pipe and we'll use the detector to check the gas coming from the process by how many % of hydrogen and cabonmonoxcide and we'll keep the record everyday to present to the officer from the environment duty department when they need the report we'll present the record to them something like ***** other gases are no need to check just this 2 gases.Do you think that you can present me the one checking for H2 and Co for me?I need only one piece of it for the amount of the budget I can not tell you that because I still can't find the one that can do like that in Thailand.Anyway my project is not profitable it's just for saving the environment and saving the world so I would like you to present the good working and cheapest one you can find and fit for ***** so much for your ***** am looking forward to hearing from you.Best regards、 ***** Wongthawikiat