The PSL Uncertainty Calculator is developed by the Primary Standards Lab at Sandia National Laboratories to calculate the combined uncertainty of a system of multiple input parameters. In general, a measurement value is calculated from […]
by Ryan Egbert & Joseph Rindone The following article is the last of a four-part Metrology 101 series focusing on temperature. The written content provided here is also intended to be combined with demonstration videos […]
by Hening Huang This technical note reports a case study that addresses a challenge of interlaboratory consensus building called for by Possolo (2020). The consensus value is estimated as a weighted-average (WA) and the associated […]
by Henry Zumbrun There is a bit of a disconnect regarding risk mitigation practices in the metrology and calibration provider community. Most likely, this comes from a misunderstanding of terminology or legacy requirements that have […]
PTBnews 03.2021 — In collaboration with an industrial partner, PTB has developed and assessed a very compact wavelength standard. This standard is based on a diode laser whose frequency is stabilized to transitions of the […]
PTBnews 3.2021 — At PTB, absolute length measurements on a single-crystal silicon gauge block have been performed using imaging interferometry. These measurements have a smaller measurement uncertainty than all previous measurements. They provide more accurate […]
Researchers at the National Institute of Standards and Technology (NIST) have conducted the first demonstration of a faster and more accurate way to calibrate certain kinds of microphones. The technique, which uses lasers to measure […]
With accuracy capabilities on par with laboratory grade thermometers, the Additel 282 is capable of handling even your most critical measurements. This ultra-high precision handheld readout features dual analog channels designed to facilitate comparison measurements […]
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