TRZ 4-in-1 Antifreeze Refractometer Ethylene Glycol, Propylene Glycol in Antifreeze Freezing Point Temperature and Concentration, AdBlue, DEF and Industrial Battery Fluid

Works great. I used distilled water to test and it was right on the money. Just a couple of drops on the lens is all you need to test.

At first I was looking for a refractometer just to test the quality of DEF fluid before I put it into my truck and to troubleshoot any poor quality DEF messages. I didn't know they made 4 in 1 testers until I started searching on Amazon. After reading the reviews on several refractometers I decide to purchase this 4-in-1 tester. I like the fact that it reads in fahrenheit and not celsius. It automatically compensates for temperature between 50 and 86 deg F. and tests 4 different types of fluid. Ethylene glycol based antifreeze ( DEX Cool ) , Propylene based antifreeze, Battery fluid and Def Fluid. It also has an adjustable eye piece to adjust the focus when looking thru the unit. It comes with a pull string storage pouch, 4 plastic eye dropper tubes to sample fluids, a lens cleaning cloth, instruction pamphlet and a tiny screw driver to adjust the calibration. It is a compact unit, approx 6" long. Calibration is checked by using distilled water. I checked the calibration of my unit out of the box and the calibration was dead on. For the price this is a great tester. I recommend it.

The TRZ 4-in-1 Antifreeze Refractometer is a must-have tool for anyone who wants to accurately test their vehicle's antifreeze. It’s simple to use and provides quick readings for Ethylene Glycol, Propylene Glycol, and freezing point—all in one device. The design is sturdy and the readings are easy to read, so I can confidently know when my car’s antifreeze needs to be replaced. This is a reliable, affordable option for car maintenance. Highly recommend for DIY mechanics!

Great to have this unit with both propylene and ethanol glycol scales. Additionally, for each it provides freeze protect temperature in Fahrenheit and percent glycol. The calibration reset seems to work well. Yes, it's not an laboratory quality instrument, but seems reasonably well built. It has worked fine for me as a home mechanic taking care of several vintage vehicles.

This refractometer is awesome. Used some samples to test the calibration and it was perfect out of the box. Helped me determine the mixture in my vehicle.

accurate testing of coolant

I was impressed with how easy this was. I have a hydronic floor heating system and had to add (distilled) water to it since it had slowly burped some out. I needed to know the freeze protection level, and this was easy to use and gave me a reading that seemed exactly where it should have been. I plan to flush the system next summer and this will come in handy for setting the dilution for the glycol since I do not know the total capacity of the system. It was easy to read and is a nice tool to have for this use.

good value. easy to use.

Je fais du Kombucha et je voulais savoir si il y avait beaucoup de sucre. Après avoir testé avec des boissons zéro sucres et boissons très sucrées, j'ai pu vérifier que ça fonctionne très bien. Et ça vient avec un petit tournevis pour régler la lecture et une pipette pour extraire et déposer le liquide sur la plaque de lecture. Excellent produit.

25% du prix du fournisseur

Good tool and easily available at Amazon.

The scale of this refractometer shows brix% and not antifreeze concentration like what is advertised. One star for false advertising.

Did not include Glycol readings on the visible scale. Useless.