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Metrology

Humidity metrology

News and Updates

Jacob Ricker

Making an Airtight Case for Freedom

President Abraham Lincoln’s first handwritten draft of the Preliminary Emancipation Proclamation, a historic document in the collection of the New York State

Events

Projects and Programs

Material Qualification

Ongoing
The lack of repeatable process outcomes from additive manufacturing (AM) has been broadly acknowledged as an impediment to widespread implementation. While most
GH_gascollectionsys

Humidity

Ongoing
The NIST Thermodynamic Metrology Group maintains and develops national standards of humidity (in the range 1 nmol/mol to 0.6 mol/mol of water concentration)

Precursor Material Qualification

The lack of repeatable process outcomes from additive manufacturing (AM) has been broadly acknowledged as an impediment to widespread implementation. While most

Humidity Calibration Services at NIST

Ongoing
Humidity calibrations at NIST are performed using its state-of-the art primary standard humidity generator. Calibrations are performed on instruments that

Publications

Silicone tube humidity generator

Author(s)
Robert F. Berg, ,
We describe the model and construction of a two-flow (or divided-flow) humidity generator, developed at LNE-CNAM, that uses mass flow controllers to mix a

Tools and Instruments