| dbp:image
|
- BIPM: The FB2 flexure-strip balance, the BIPM's modern precision balance featuring a standard deviation of one ten-billionth of a kilogram (en)
- BIPM: Steam cleaning a 1 kg prototype before a mass comparison (en)
- BIPM: Mettler HK1000 balance, featuring 1μg resolution and a 4kg maximum mass. Also used by NIST and Sandia National Laboratories' Primary Standards Laboratory (en)
- NIST: K20, the US National Prototype Kilogram resting on an egg crate fluorescent light panel (en)
- NIST: This particular Rueprecht Balance, an Austrian-made precision balance, was used by the NIST from 1945 until 1960 (en)
- BIPM: The IPK and its six sister copies in their vault (en)
- BIPM: The IPK in three nested bell jars (en)
|
