| 摘要 |
PURPOSE:To improve the detection accuracy of hydrogen concentration, by uniformalizing a temperature of a sampling fluid flowing into a nickel diffusion film part. CONSTITUTION:Sodium passed through an economizer inner tube 5 is mixed in a mixing room 6 sufficiently and is made to have a uniform temperature. Said sodium is branched i two parts at the lower stream side of the room 6 and is brought into contact wth a nickel diffusion film provided at the tip end of each branch tube 7a, 7b at a uniform temperature passing through the tubes 7a, 7b. Hereby, the nickel diffusion film is made to have a uniform prescribed temperature and each hydrogen transmissivity is made in a fixed value. Sodium passed through the nickel diffusion film flows in an annular part formed by each tube 9a, 9b and enters in an economizer inner tube 10 and then, is returned to a main stream. By such constitution, a noise of a hydrogen detector is lowered and the detection accuracy is improved because the hydrogen transmissivity of the nickel diffusion film is kept constant. |
