To provide an apparatus and a method for monitoring a dissolved gas in oil that can send back the oil into oil equipment without allowing the oil to come into contact with the air after the monitoring operation of oil.
A non-bellows-type gas extracting chamber 3 is airtightly connected to the inside of the oil equipment via a first pipeline 111 having an oil conveying pump 13 and a second pipeline 112. An extracted gas accommodation chamber 4 is provided while being separated from the gas extracting chamber 3, and both the chambers 3, 4 are airtightly connected via an on/off valve 15. In a gas extraction process, the gas extracting chamber 3 that is filled with oil to be tested is allowed to communicate with the extracted-gas accommodation chamber 4 that is kept vacuum by opening the on/off valve 15, the on/off valve 15 is closed for cutting off both the chambers 3, 4 after gas is extracted and the oil to be tested is sent back into the oil equipment without coming into contact with the air. The extracted gas inside the extracted gas accommodation chamber 4 is mixed with the air and is analyzed by a gas analyzer 6.
Toshihide Kodama
Takenaka Ikuo
Keigo Murakami