How accurate are refractometers?

[gordoncheers]

I have 2 refractometers from revoreef and they're both giving me different readings.

 

[OrionN]

I have 2 refractometers from revoreef and they're both giving me different readings.

They are very consistent. You must calibrate them to make sure they are accurate. I use RO water to calibrate them.

 

[Randy Holmes-Farley Verified Community Expert]

I have 2 refractometers from revoreef and they're both giving me different readings.

Then there's your answer: either one or both are inaccurate. :)

What values?

Have you calibrated them? How?

Which brand of refractometers?

 

[Gumbies R Us]

Make sure you calibrate them using calibration solution!