Performance Tool W16500 Professional DEF Tester (Disc Type DEF, Diesel Exhaust Fluid tester)

Arrived on time and works as designed.

Trabaja muy bien, lo único que no me gustó, es que el material con el que está hecho, es muy frágil, por lo demás hace buen trabajo

You can spend ten times as much for a more technical tool and if your doing research, you should do so. I had purchased two jugs of DEF from WalMart as I had ten times before with oil to do an LOF on my BMW M57Y motor. Shortly after adding it to my tank, I received a msg telling me that I had 200 miles before my engine would not start and had to be reset by the dealer. My independent mechanic told me to test it and recommended that I purchase this to do so. While they drained my system and refilled it, I tested the bottle of what was left and wouldn't you know...I would have saved myself several hundred dollars had I just tested it before I put it in. Now I'm fighting WalMart and their manufacturer for reimbursement.

Works very easy and accurately

so i wanted to check my antifreeze. so i looked for an awsome antifreeze checker do Hickie. and put one on my wishlist. well, the wife decided to clean off my wishlist because i had to many unneeded things. after she deleted everything we had the blizzard of 2022 and there were no antifreeze checkers in any auto parts store on the planet. so she panics goes to amazon and orders me this. the amazing thing i cannot use. well until the zombie apocalypse then i will need it for killing zombies. great job. looks high quality through the plastic. and the little disks slide around when i jiggle it like a rattle. keep up the good work...

I tested 2 containers of DEF. Never did get any discs to float. But the refractometer said the fluid was fine

I'm not sure I would buy again for several reasons: I doubt that the 3 balls are going to have enough resolution to determine if DEF is just slightly out of spec. Two- the long hose, won't reach the DEF in my 22 Silverado unless the tank was very full, so it's just not that useful. Will it test DEF in a jug, sure.

Well, I purchased this tool and the refractometer one. I'm new at this stuff but I though why not get both to help learn and two tools to do the same test would confirm whatever results were obtained. Well, maybe it's just me but this tool did not work as easily as I was lead to believe. There's three discs in it that are supposed to float when the DEF is inside the tube. Just how high these discs float and just how many, determines the percentage of the Urea in the DEF. Well, I'd fill the tube to the required amount and those discs just sat at the bottom. I'd have to shake that tube quite a bit to make them break free of the friction hold they had on the glass of the inside of the tube. To me, that's not how they are supposed to work. You shouldn't have to bang that tube around to make those float appropriately. I tried several times with new DEF etc. and it was the same result every time. So, I really can't give this item any more than three stars. Sorry.

I needed to know if my def was good or not. This device was easy to use

I had a few containers of DEF and was worried about them being past the expiration date so purchased this item and was relieved to find all containers still read “Good”. Well worth it!

Practical working good. Easy to use

Tip where hose connects broke off, cheap plastic part!!

Works good , bought 2 for my shop it works well and helps with repairs to DEF systems