| 摘要 |
<P>PROBLEM TO BE SOLVED: To provide a TVCO meter capable of carrying out a measurement without being affected by amounts of carbon dioxide and oxygen in a sample gas. <P>SOLUTION: An oxygen concentration of the sample gas G1 flowing at a constant rate is measured by a magnetic type oxygen meter 2, and then the sample gas G1 is burned completely in a burning catalytic oxidizing furnace 3, and an oxygen concentration of the exhausted sample gas G2 is measured by a magnetic type oxygen meter 4, and an oxygen concentration difference is obtained by inputting electric signals E1, E2 proportional to respective measured values into an arithmetic processing device 5, and then the oxygen concentration difference is subjected to an arithmetic process, thereby obtaining the concentration of total volatile organic compounds (TVOC) of the sample gas G1. <P>COPYRIGHT: (C)2007,JPO&INPIT |
