|
|
Article: INFRARED SENSOR PROVIDES DIRECT MEASUREMENT OF WATER VAPOR.(Telaire Systems' Vaporstat)
- Article from:
- Sensor Business Digest
- Article date:
- January 1, 2002
CopyrightCOPYRIGHT 2002 Vital Information Publications. This material is published under license from the publisher through the Gale Group, Farmington Hills, Michigan. All inquiries regarding rights should be directed to the Gale Group. (Hide copyright information)
|
Humidity measurement quantifies the amount of water vapor in air or other gases. A measurement of relative humidity (RH) reflects the amount of moisture (water vapor) air can hold at certain temperature.(% RH is the ratio of existing water vapor pressure to the saturation water vapor pressure, multiplied by 100). The relative humidity will change with a change in temperature.
A measurement of dew point, or absolute humidity, refers to the absolute amount of water vapor in the air and is not affected by temperature. Absolute humidity is the ratio of the mass water vapor to volume of air or gas. Dew point temperature is the temperature at which the water vapor ...