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Reef Chemistry Question of the Day [HASHTAG]#179[/HASHTAG]
Some refractometers have the attribute that they can correct for temperature changes, and some do not. This attribute is usually called ATC, or Automatic Temperature Compensation.
How do typical refractometers accomplish ATC?
A. The reticule (the part with the scale printed on it) is made from a material with almost no thermal expansion over the temperature range specified
B. The optical lenses are made of high quality glass rather than plastic, so they do not expand and contract as much
C. The crystal used for the prism is designed to have a very low temperature expansion coefficient, like Pyrex glassware does to prevent breakage due to temperature shock
D. They have a metal strip that expands and contracts, moving the optics to adjust for temperature changes.
Good luck!
.
Some refractometers have the attribute that they can correct for temperature changes, and some do not. This attribute is usually called ATC, or Automatic Temperature Compensation.
How do typical refractometers accomplish ATC?
A. The reticule (the part with the scale printed on it) is made from a material with almost no thermal expansion over the temperature range specified
B. The optical lenses are made of high quality glass rather than plastic, so they do not expand and contract as much
C. The crystal used for the prism is designed to have a very low temperature expansion coefficient, like Pyrex glassware does to prevent breakage due to temperature shock
D. They have a metal strip that expands and contracts, moving the optics to adjust for temperature changes.
Good luck!
.