Easy to read hydrometer, designed for modern Ethylene Glycol antifreeze. Also suitable for use on Organic Acid Technology (OAT) antifreeze.
Number of floating discs measures the level of coolant protection.
Tests at hot and cold temperatures; reads in celsius and fahrenheit.
Floating orange disc shows over protection and loss of efficiency. Bulb is Black with 6 coloured discs.
For the Propylene Glycol Antifreeze Tester, please see Laser Part No. 4292.