- Alkalinity DKH Colorimeter HI772 Hanna Checker - Marine Water
Why does BRS recommend this?
The Hanna Alkalinity checker is an awesome little tool that now will give results in DKH values that are much more common in the aquarium hobby. It will also give you accurate easy to read results with the large LCD display. We like the repeatable results and ability to purchase replacement reagents when needed. The biggest key with Hanna checkers is keeping the vials nice and clean for consistent results.
Uses Hanna HI772-26 liquid reagents
Three simple steps to results. The Hanna Alkalinity Checker bridges the gap between simple chemical test kits and professional instrumentation. Accurate, affordable and easy to use. First, zero the instrument with your water sample. Next, add the reagent. Last, place the vial into the Hanna Alkalinity Checker, press the button and read the results. Done.
Easier to use and more accurate than chemical test kits
Chemical and titration test kits have limited accuracy and very hard to repeat that usually will rely on the human eye and lighting to determine the reading. Hanna's HI772 Alkalinity Checker is much more reliable with their single light source with a fixed wavelength that will give the electronic checker the ability to make repeatable measurements time after time. Similar measurement devices are used by labs and large-scale testing facilities for their dependable and precise measurements.
Dedicated to a single parameter
Instead of a single unit doing everything, each Hanna Checker is designed to perform a test for a single parameter. This allows the test to have greater precision while also making it easier to use overall.
Small Size, Big Convenience
Weighing a mere 65 g (2.3 oz.), the Checker®HC easily fits into the palm of your hand or pocket. Use for quick and accurate on the spot analysis. Single-button operation: Zero and Measure Operated by a single AAA battery.
- Range: 0.0 to 20.0 dKH
- Resolution: 0.1 dKH
- Precision: ±0.3 dKH ±5% of reading
- Light Source: LED @ 610 nm
- Light Detector: Silicon photocell
- Environment: 0 to 50°C (32 to 122°F); RH max 95% non-condensing
- Battery Type: (1) 1.5V AAA
- Auto-off: After 10 minutes of non-use and after read
- Dimensions: 81.5 x 61 x 37.5 mm (3.2 x 2.4 x 1.5")
- Weight: 64 g (2.25 oz.)
- Method: Colorimetric method
- HI772 Checker
- 2 sample cuvettes with caps
- 1 bottle of alkalinity reagent hi772-26
- 1 ml syringe and tip
- quick start guide.
Quick and easy. By donald on 7/10/2020donald would recommend this product to a friendI wish I would have bought this years ago. So much quicker and easier than the Salifert I had been using.
Should’ve bought one sooner! By Andrew on 5/21/2020Andrew would recommend this product to a friendI love this thing! It’s very quick and easy to use. The purchase is worth every penny.
Inconsistent with refills By Sean on 5/21/2020Sean wouldn't recommend this product to a friendFirst off I am a big Hanna fan, but I have to say my first test with my new bottle of reagent was WAY different than the previous one. I test everyday and have been a consistent 8.8 to 8.9 for weeks. The first test with the new bottle it was 7.3! I tried new water and vial and got the same results. This is where now I ha e to revert back to a drip test to validate and that’s not what I expect with this price of a kit as well as the performance of my Phosphate and Calc tests which have been consistent even with new reagents.
Nice, but... By Derek on 5/12/2020Derek would recommend this product to a friendLet me start by saying this is by far the best test kit I've come across for testing alkalinity. The directions are clear, the process is quick and easy and what's better than a digital read out!? Love the simplicity. As for the checker itself I think there is room for a few improvements. First thing I would say is putting in the battery. It would be really nice to have some kind of tab or spring loaded battery compartment instead of a screw and nothing to grip to try to pry the compartment open. I nearly broke it upon arrival trying to get that battery compartment open. Same thing goes for the lid where you place the Cuvette. Without a Cuvette in the checker it opens and closes pretty easily, once you place it in there though the checker becomes a little difficult to open and close. A simple button here would make life a lot easier. I hope to see these things addressed in future models as I am not the only one to review these issues.
Good alak checker, but the reagents are inconsistent. By Terry on 5/11/2020Terry wouldn't recommend this product to a friendDon't let this tester burn you like it did me. The problem is Hannah reagents are inconsistent. When you switch to a new refill, be prepared for much different reading. I will stick to my salifert test kit.
Accurate By Felipe on 3/19/2020Felipe would recommend this product to a friendVery easy to use and consistent. This test kit is the most accurate one i've used. I actually tested this against calibration solution and was right on the number. I do wish it came with more tests; I will be looking to purchase reagent refill soon. Also battery compartment is somewhat difficult to open, but once battery is inside rarely needs replacing : /
Very difficult to place battery By David on 2/22/2020David wouldn't recommend this product to a friendTaking the screw out to put in the battery is very difficult. I would never purchase this product and will try to return it. NOT WORTH THE TROUBLE.
Great results By David on 2/13/2020David would recommend this product to a friendMy reefing buddy just bought this test kit for me and I must say it’s amazing and the results are accurate tested it out on his 180 reef tank and it was dead on with the trident
Skeptical but love it By Scott on 12/20/2019Scott would recommend this product to a friendI was very skeptical of this, and looked at it on and off for years. I finally bought it and I love it, and it has been very accurate. I even occasionally double check it with the red sea alk test, and it's always very close. One thing I learned after doing some research, when you put water in this vial it makes a u shape. Make sure the bottom of the u touches the 10ml fill line, not the top.
Awesomeness and ease By Trey on 6/13/2019Trey would recommend this product to a friendThis product is so much more accurate than any titration based test. I check my alk DAILY.
Solid kit. Nice case for storage.
Reliable and repeated accurate results. Thanks guys!
I am not a robot(captcha)
Quick and accurate By Tom on 4/29/2019Tom would recommend this product to a friendDoesn't use packets of powder, yay! Hate those.
But this is a simple and quick test. No matching colors, just stick it in the slot and hit the buttons.
Super easy to use By Michael on 3/15/2019Michael would recommend this product to a friendMy Hanna Alkalinity checker gives me a reading of 180. I cannot imagine it's this high. I checked with my API Reef Master kit and it's reading 9dKH. I would give the nod to the Hanna Checker as the numbers are pretty close.
The spec says that the accuracy is +/-0.3 and +/- 5% of reading. So a reading of 10.0 could really be anywhere from 9.2 to 10.8. That's huge. Is that the spread of errors over many checkers and I could be lucky and get a good one, or is that the spread of measurement errors for any particular checker?
The dKH checker by Hanna is one if the easiest to use and just as accurate as all current hobby grade test kits for dKH currently available. Feel free to let us know if you have any further questions!
Hanna list a calibration kit specifically for the HI772. Do you carry this or will the one for the HI775 work?
How many tests will the included reagent perform.
This checker includes 25 tests. If you have any other questions, let us know!
Do you use the extra tip for the syringe just to fill the syringe with the reagent or do you fill the reagent to 1mill+extra tip full into the vial? thanks!
The tip should be attached to the syringe prior to drawing the reagent fluid. You will want to draw the plunger to the 1mL mark, and the actual fluid will not actually be drawn into the syringe, but will just be drawn into the tip. This ensures more consistent dosing, and avoids fluid fouling the syringe portion.
Hope this helps!
What the difference from this an the HI775?
This checker includes a tip with the syringe . Do I NEED to use three tip to get the properly calibrated reading. Or can I use the 1ml marking on the syringe
While there are those that do not use the tip for drawing reagent, the manufacturer does specifically recommend using the tip for the best consistency and accuracy, and we recommend following their directions.
Have a great day!
Will they provide a new reagent for this new HI772 Alk Checker (dKH) or does the previous HI755-26 reagent work?
This checker will use the same reagent as the HI755-26. Feel free to let us know if you have any further questions!