4   Refractometer for Battery/coolant/cleanser/antifreeze
This automotive coolant refractometer is designed to test concentration

of antifreeze liquid, cleaning fluids, electrolyte solution batteries

strength in unit of Specific Gravity (sg) and measures the

concentration of battery coolant plus battery charge condition. With

the indication of the percentage of concentration, you will know at

which temperature (centigrade ) of the fluid will be frozen for both

Propylene Glycol and Ethylene Glycol. It checks the freezing point of

antifreeze used in car and truck radiators. If the antifreeze is

diluted, it will freeze if it gets too cold - a very bad thing! This

can crack the engine block and destroy the engine. The built-in ATC is

automatically adjusted to correct temperature discrepancies of

environment temperature. It uses ambient light only and no batteries

are needed.
Anyone who runs a fleet of trucks, buses, cars or even ground equipment

- school buses, truck fleets, taxi cabs, the post office, airlines,

construction companies, car and truck radiators, large commercial air

conditioners, etc - are good prospects for this product. It insure that

all is working properly, and not causing problems (like rust, prone to

freezing, poor charging, poor cooling, etc.). This unit is also

fantastic for testing aviation grade hydraulic oils (like Skydrol),

Glycol-based heat transfer fluids, and fire resistant hydraulic fluids

used in die casting or foundry applications.