Ethylene/Propylene Glycol Refractometer Hand Held Propylene/Ethylene Glycol Range -60 Degrees F to 32 Degrees F 1.15 to 1.30 specific gravity Automatic Temperature Compensation Yes Accuracy +/-2 Percent Resolution 2 Degrees F Function Measure the Freezing Point of Polyproylene and Ethylene Glycol and Battery Acid Specific Gravity Specific Gravity 1.15 to 1.30 Freezing Point -60 to 25 Degrees F Propylene -60 to 32 Degrees F Ethylene