| 摘要 |
PROBLEM TO BE SOLVED: To provide a magnetic pressure type oxygen analyzer capable of measuring the concentration of oxygen with high accuracy. SOLUTION: The magnetic pressure type oxygen analyzer includes a measuring chamber 2 having a pair of magnetic poles 21; an AC power supply 3 for output of an AC current for the pair of magnetic poles 21; a detector 4 having a condenser microphone 41; and a bandpass filter 5 for selectively passing electric signals having the same frequency as that of the AC current output by the AC power supply 3 among electric signals output from the condenser microphone 41. The magnetic pressure type oxygen analyzer further includes a pump 6 which supplies a sample gas for the measuring chamber 2 and in which the frequency of pulsations generated thereby is not an integral multiple of the frequency of the AC current output by the AC power supply 3. COPYRIGHT: (C)2011,JPO&INPIT |
