Pycnometers

Hex · May 17, 2011

Any experience with these? I have a gram scale that can mass to 0.01g, will I be able to measure relative gravity if I get one of these (pycnometer)?

http://www.verrerie-laboratoire.com/Pycnometers_to_Gay-Lussac_unadjusted.asp

http://en.wikipedia.org/wiki/Pycnometer#Pycnometer

Inodoro_Pereyra · May 17, 2011

I don't see what's so special about it. You can measure S.G accurately with just a scale and any way to measure exactly a given amount of fluid (which seems to be what the pycnometer is).
I don't know how much that pycnometer is, but you can do the same with a small erlenmeyer and your scale.

Hex · May 17, 2011

Mass is easy to measure, volume more difficult. With the flask, differences of surface tension/meniscus and relatively large opening will affect accuracy. With the pycnometer, you fill then squish to ground glass through the capillary, precession volume.

Pycnometers

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Pycnometers

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