Refractometer?

an411 · 01/16/2008, 03:27 PM

Do they need to be calibrated and if so how is this done?

Randy Holmes-Farley · 01/16/2008, 03:33 PM

Yes. While manufacturers often claim that pure fresh water is adequate, the ones sold to the hobby can be so cheaply made that that is not always true, and calibration with a seawater standard is better. This article has more:

Refractometers and Salinity Measurement
http://reefkeeping.com/issues/2006-12/rhf/index.php

01/16/2008, 03:27 PM	#1
an411 Registered Member Join Date: Feb 2007 Location: Derby CT Posts: 2,861	Refractometer? Do they need to be calibrated and if so how is this done?

01/16/2008, 03:33 PM	#2
Randy Holmes-Farley Reef Chemist Join Date: Apr 2001 Location: Arlington, Massachusetts Posts: 86,233	Yes. While manufacturers often claim that pure fresh water is adequate, the ones sold to the hobby can be so cheaply made that that is not always true, and calibration with a seawater standard is better. This article has more: Refractometers and Salinity Measurement http://reefkeeping.com/issues/2006-12/rhf/index.php __________________ Randy Holmes-Farley Current Tank Info: 120 mixed reef