3-in-1 Antifreeze Tester in Fahrenheit Scale for Checking Freezing Point and Concentration of Ethylene Glycol or Propylene Glycol Based Automobile Antifreeze Coolant, Also for Battery Acid Condition

Very nice tool. Came in handy before the blizzard in the south!

This antifreeze tester is exactly what I needed to check the freezing point of my coolant before winter hits. It’s super simple to use, and the Fahrenheit scale is perfect for my needs. It gives an accurate, reliable reading every time. I love how compact it is, so it’s easy to store in my toolbox. A must-have for anyone who wants to make sure their vehicle is ready for cold weather.

This item works great for the price.

Accurate scales for both ethylene and propylene glycol, easy to adjust focus, and quality build. Recommended!Other reviews say it is hard to read... if the coolant is dirty, polluted or pH is extreme then the line will be fuzzy or more of a gradient. This is normal for all refractometers, if you doubt your readings then try it with new coolant and you'll see a well defined line.Concentration (freeze temp) is only one important coolant parameter, the other is pH. Coolant pH is generally considered ok when between 8.5pH and 10pH, slightly alkaline - it prevents corrosion. When the pH is out of range either way it's time to flush and replace. Especially if it starts becoming acidic (lower than 7pH) because it can cause damage to engine components and hoses. Test strips are really cheap insurance when used alongside the refractometer.This refractometer is a good product and a good value.

Super simple to use and is accurate when comparing to other testers. Made the mistake of buying the Celsius version on accident. This one is in Fahrenheit!

Impressed, needed something to test antifreeze and wanted something better than the old style floating ball tester. Very easy to use. Appears to be very good quality and nice case.

Easy to use and seems accurate

I’ve tested multiple cars and several gallons of concentrate that I had premixed 8 years ago. Easy to use and the instructions were easy to follow. Highly recommended.