Referenssikosteuslähteet

Referenssikosteuslähteet, or reference humidity sources, are crucial tools in calibration and research for precisely controlling and measuring atmospheric humidity. These sources are designed to generate stable and well-defined levels of relative humidity, often at specific temperature points. They are essential for ensuring the accuracy of humidity sensors, hygrometers, and other environmental monitoring equipment.

The principle behind many reference humidity sources involves precisely mixing dry air with saturated water vapor. By controlling the flow rates and temperatures of these two components, a specific relative humidity can be maintained at the output. Alternatively, some sources utilize a saturated salt solution within a sealed chamber. The vapor pressure above such a solution is a well-established function of temperature, allowing for the generation of a constant and predictable relative humidity. Different salt solutions are used to achieve various humidity levels.

The reliability of reference humidity sources is paramount. They are typically characterized and calibrated against primary standards, ensuring traceable accuracy. These sources find application in meteorological services, industrial process control, environmental chambers, and scientific laboratories where accurate humidity data is critical for product quality, research integrity, and regulatory compliance. Their stability and accuracy contribute significantly to the overall precision of humidity measurements across various fields.