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

I had the old Prestone squeeze bulb device that seems to have served me well for the last 30 or 35 years. However, on my last coolant exchange on on3 of my vehicles, it was telling me the freeze protection was only down to 20 below....even though I had mixed the concentrated antifreeze with 50% distilled water...which should protect down to about 34 below. I checked, double checked, and checked a couple of my other vehicles and it again said about 20 below.I started looking for other options, and this product popped up. Reviews looked good, and there are several others available through other companies,....but most read in Celsius, and this one reads in Fahrenheit....which is what I'm familiar with.It works great and showed me I was protected down to 34 below....which seems right given my 50/50 mix. Easy enough to use, but you do have to wipe it down when done. Comes with a nice padded case to store it in. I'm very happy!

Surprisingly well made for the price. No way to verify accuracy but matches my old specific-gravity type reading very well, without the mess of drawing a lot of fluid.

Well, I was tired of trying to be cheap and use a bulb/float type of antifreeze tester. I had the old unit for a long time and I was not sure if it would give me an accurate reading any longer.So, I decided to pay just a couple of bucks more for this fractometer. There are many on the market, but I tried the Amazon pick. :-)This one is pretty much an industry standard model probabaly made by the same manufacturer and renamed. That's fine with me.But this one has the temerature index in fahremheit! So that was kind of neat to me.It comes with a little screw driver, in case you have to set the base line! (Mine was perfect and calibrated out of the box.)It comes with a little pipett to take your sample with.And of course you get the very nice fractometer.And last but not least it comes in a pretty nice plastic carrying case that has foam protectores and a shortset of instruction on how to use it.This unit came to my home very quickly; Infact one day early!! :-)I don't have anything negative to say at this point.My friends like me checking their antifreeze and giving them an accurate freeze level.I feel, besides not changing your oil, the next killer of the modern automotive engine is not makingsure your antifreeze gets changed and that it has the proper mixture, then accurately tested withthis unit.It feels good to use this unit compared to the old cheap floating style of tester because you can actually see the freeze point without guessing from a floating piece of plastic that may be broken down from time.I am not a professional mechanic, but I am learned very well in automotive technology.So, that is my opinion that may not weigh well with an engineer or other scientist or some erudites.But as an average Joe, I think you will enjoy having this unit in your arsonal of tools.=KL=

I’m not a mechanic so no access to expensive test equipment, but wanted to COMPARE this test device to the old school method which use the floating balls.I had to order a new hydrometer ( old style) to do the comparison, old one broke. I NEED to know the freeze level, as I am storing a car in the mountains of Colorado. Once calibrated ( easy) I feel the refractometer is more accurate than the old hydrometer method. Highly recommend.

I purchased this as an added way to test the antifreeze in my vehicles. It is good quality, easy to read, and works very well! The quality and price are excellent!

With new coolants being both very expensive, and having longer lifespans, it's harder to just guess that it's time to change the stuff. This tells where the fluid is at as far as its ability to protect the engine and avoid freezing. I tested it on vehicles with newer and older coolant, and the readings reflected the known age.

tested against 3 different coolant and 2 different def testers and it is just as accurate yet less than half the cost. I haven't checked accuracy on the battery acid yet but that's not really what I bought it for anyway.

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