4-in-1 DEF Antifreeze Coolant Refractometer for Automobile Antifreeze System, Diesel Exhaust Fluid, Battery Acid and Windshield Washer Fluid

I use this to check cars and motorcycle fluid and works very well

Great quality

I tested window washer fluid and battery acid and the results were what I expected. The tester was already calibrated out of the box when I tested it with distilled water. I used distilled water to purge the sample tool between tests and used a separate cleaning cloth for the battery acid. I rated a 4 because the scale for the washer fluid is confusing and I needed to take my glasses off to read it accurately. Maybe I need to look at again more closely but the brief look, the washer fluid scale has two different measurements.

Good product

I recently had to add water to my truck's cooling system to continue to drive it until I could get some antifreeze. I bought full strength antifreeze rather than the 50-50 type since I knew I couldn't drain the all weak water/antifreeze mix that still remained. After draining all I could I added pure antifreeze to the remaining coolant and with the help of this tool I got a perfect mix. Although it reads in celsius doing the conversion to fahrenheit is easy so it doesn't present a problem for me. It can also check the windshield washer fluid if I have been using a summer mix and then transition to winter mix.

Works great and perfectly described.

I liked that the device was easy to use and very easy to view the results. I highly recommend this device.

When testing antifreeze you will have to convert Celsius to Fahrenheit if your in the US.