Dissolved gas concentration measuring device and dissolved gas concentration measuring method

摘要

Provided are a dissolved gas concentration measuring apparatus and a dissolved gas concentration measuring method capable of easily and reliably continuously measuring the concentration of a dissolved gas dissolved in a liquid. In the dissolved gas concentration measuring apparatus, the first container 11 has a constant free space 18 a occupied by liquids other than liquid and an air intake hole 14 into which external air can flow in the free space 18 a. Dissolved gas separated from the liquid mixes with the external air flowing from the air intake hole 14 and is supplied to the concentration sensor 3 in the form of a mixed gas.