Refractometer calibration

[arawona1964]

What is the correct way to calibrate a refractometer

 

[rtparty]

Look up Randy's DIY solution and make it. Then calibrate your refractometer to that

 

[Randy Holmes-Farley Verified Community Expert]

What is the correct way to calibrate a refractometer

Depends on the refractometer type. A few must be calibrated with Ro/DI because they electronically force it (Milwaukee Ma887, for example), but they should also be checked with a salinity standard. Most should be calibrated with a standard for reasons detailed in these articles.

https://www.reef2reef.com/ams/reef-aquarium-salinity-diy-calibration-standards.956/
https://www.reefedition.com/refractometers-salinity-measurement/