Freeze Check Refractometer

An economical, highly accurate instrument for testing the point at which antifreeze solutions begin to solidify. No charts, graphs or conversions. Eliminates guesswork, reassuring the user that the unit is protected to the desired level. Saves money by eliminating over-use of antifreeze and verifying proper protection. Recommended for use with winterization methods where propylene glycol based antifreezes are used.