antifreeze tester

What Is The Best Antifreeze Tester? Editor’s Choice: Prestone Antifreeze/Coolant Tester (AF-1420) … OEMTOOLS Professional Series Antifreeze Tester (24507) … Best for Cold Climates: SMARTSMITH Antifreeze Refractometer. … Phoenix Systems Coolant Test Strips (8006-B) … ABN Deluxe Antifreeze Tester. What is the best type of antifreeze tester? Prestone AF-1420-6PK Antifreeze Tester. Check Price at Amazon.