| 摘要 |
2085611 9218854 PCTABS00017 A method of determining the dew point or frost point of a gas containing a very small amount of water using an optical dew point meter including a reflector mirror the temperature of which can be varied from room temperature to any point of -80 ·C or below, a means of contacting said reflector mirror with the gas to be measured, a means of irradiating said reflector mirror with focused rays of light and/or laser light, and a means of detecting the change in scattered light and/or reflected light due to the dew and/or frost condensed on said reflector mirror, said method comprises detecting the temperature at which the scattered light has a maximum intensity and/or the temperature at which the reflected light has a minimum intensity and the temperature at which the scattered light has a minimum intensity and/or the temperature at which the reflected light has a maximum intensity by elevating and cooling the reflector mirror is disclosed.
|
