Monoethylene glycol and mono propylene glycol are used extensively as antifreeze in closed cooling systems. Dose concentrations vary dependant upon the level of antifreeze protection required (ºC).

Refrigeration units and engine cooling systems use glycol in concentrations up to 60% v/v to maintain coolant fluidity at low temperatures.

The Glycol Refractometer offers a convenient, fast and accurate way for testing / analyzing the glycol concentration of engine coolants and other anti-freeze solutions.