Camco Freeze Check Refractometer
Save money by eliminating the over-use of antifreeze-The Camco Freeze Check Refractometer is an economical, high accurate instrument for testing the point at which antifreeze solutions begin to solidify. This refractometer eliminates guesswork, and doesn't require any graphs, charts or conversions. Ensures that the unit being winterized is protected to the desired level.
Recommended for use with winterization methods where propylene glycol based antifreezes are used.