Glycol Refractometer

What type of Glycol Refractometer is this?
This Glycol Refractometer is used to determine the freeze points of Propylene Glycol and Ethylene Glycol fluid solutions. Temperature Range 32 F to -60F. !

Propylene Glycol and Ethylene Glycol is often mixed at many different dilution ratios. The solution concentration is directly related to freeze point. Failure to properly monitor your freeze point will initially lead to product slushing and ultimately bulk freezing.

When freezing occurs, it often leads to damaged pipes and lose of product. In some cases, ethylene glycol is dangerous if consumed by animals or humans. The product life of the propylene glycol and ethylene glycol is long. Many times just purchasing more concentrated product will save significant money instead replacing out the entire solution.