Aiming at the problems in the verification process of pressure transmitters by enterprises, this article first introduces the related concepts of pressure transmitters, then expounds the preparatory work before pressure transmitter verification, and introduces the pressure transmitter in detail.

Keywords: Yokogawa Instrument, Coal Chemical Industry, Hydrogen PermeationAbstract: In the coal chemical industry, pressure transmitters are used in many occasions. However, compared with traditional industries, there are many working conditions where the medium is black water or gray water, the tem