Wich is more prone to inacuracy?

[boxfishpooalot]

1)Hydrometer

2)Refractometer(with atc)

3)Electronic salinity meter(with atc)

Wich device would be more suceptable in giving inacurate results? Wich could result in serious problems?

Thanks Master Chemist! :)

[iCam]

I would think that the hydrometer would be the least accurate of the bunch.

[Randy Holmes-Farley]

I agree that the typical hydrometers sold to the hobby are the least accurate of those, on balance. High quality glass hydrometers used at appropriate temperatures can be very accurate, however.

[boxfishpooalot]

If, on a refractometer, you look through it on a single source of light output, a color pure from the electromagnetic spectrum.Would it work the same? Or does a refractometer rely on all the colors to refract the sample tested?

[Randy Holmes-Farley]

Ideally, refractometers use a single wavelength. Often it is a single emission line from sodium ions in a flame (called the D line, IIRC). It is yellow.