THEXTON 107 PROPYLENE GLYCOL BASED ANTI-FREEZE TESTER
Disc-Type (PG) Anti-Freeze Tester 
Professional disc-type 16 1/4" tester is used to test propylene glycol-based antifreeze in automotive radiators. Number of floating discs measures level of protection. Temperature compensating tester is accurate whether coolant is hot or cold. Readings in Celsius and Fahrenheit.