This product can configure the target concentration, standard gas concentration, and final pressure according to the user's needs. Add the four standard gases to the canister in sequence to mix, then add the diluent gas to the canister, and pressurize to the required standard gas (also It is called primary standard gas). The primary standard gas can also be diluted again, or the atmospheric sample can be diluted under pressure. The entire process is fully automatic calculation and fully automatic operation.