The detection instruments are divided into detecting the hydrogen content, water content, and oxygen content of various gases. They are hydrogen analyzer, dew point analyzer, and micro oxygen analyzer. The range of the hydrogen analyzer can be customized from 0-99.999% according to user requirements. The dew point meter has a range of 20~-80 ℃, and the conventional range of the micro oxygen meter is 0-1000ppm. The online detection instrument needs to be returned to the factory for inspection once a year to prevent zero drift caused by long-term non calibration of the instrument. The lifespan of the side inspection instrument sensor is generally 2-3 years and needs to be replaced once.