Hannah accuracy: Phosphate ULR vs Phosphorus ULR

[Mattiejay6]

So I have both test kits.
On my Phosphate ULR. I get results of 0.00
On my Phosphorus ULR I get 20 ppb.

I don’t know anything if the test are the same or not, but my results seem to show they are different reagents.

 

[thatmanMIKEson]

@ColoredRock

I’ve had the phosphorus checker for about 2 years but I’m getting annoyed by needing to convert my results all the time.

I want to know if switching to the ULR Phosphate will be a significant downgrade.

I have both and I never use the phosphorus checker because of the same reason it may be a little more accurate but I only need to know there's a little phosphates in the system not an exact number.. but yes same 4 me

 

[Miami Reef]

I have both and I never use the phosphorus checker because of the same reason it may be a little more accurate but I only need to know there's a little phosphates in the system not an exact number.. but yes same 4 me

Oops. I forgot to update!

I did the switch and I’m so glad! I haven’t had my phosphate checker shut down on me mid testing like the phosphorous checker did.

I am not needing extreme precision. Just to ensure I have a trace amount without going too low. I also like the convenience that it reads in ppm.

Overall, I’m happy.

 

[92Miata]

The biggest difference between the two is in usability. The ULR Phosphate Checker has a significantly longer timeout than the ULR Phosphorus Checker.

During step 2, where you shake for 2 minutes - the timeout for the ULR Phosphorus checker is 3 minutes - if you dilly dally opening the packet, or adding the reagent to the tube, you can run yourself out of time and have the meter turn off. With the ULR Phosphate checker, that timeout is 7 minutes. This makes it hugely more user friendly.


The difference in accuracy/precision between the two models is smaller than the difference in accuracy/precision between individual meters - because Hanna's quality control in the aquarium space is not so good.

 

[BitReef]

The biggest difference between the two is in usability. The ULR Phosphate Checker has a significantly longer timeout than the ULR Phosphorus Checker.

During step 2, where you shake for 2 minutes - the timeout for the ULR Phosphorus checker is 3 minutes - if you dilly dally opening the packet, or adding the reagent to the tube, you can run yourself out of time and have the meter turn off. With the ULR Phosphate checker, that timeout is 7 minutes. This makes it hugely more user friendly.


The difference in accuracy/precision between the two models is smaller than the difference in accuracy/precision between individual meters - because Hanna's quality control in the aquarium space is not so good.

This is absolutely right. The ULR Phosphate checker is the way to go simply because of the increased timeout.

I probably waste 10% of my reagent packets due to the short timeout on the ULR Phosphorus checker. I either don’t get all of the mixing done in time, or I walk off during the 3 minute count down and when I come back the unit has shut off. Very frustrating.

The Nitrate HR checker has a longer timeout and I never miss my reading.

 

[KStatefan]

The biggest difference between the two is in usability. The ULR Phosphate Checker has a significantly longer timeout than the ULR Phosphorus Checker.

During step 2, where you shake for 2 minutes - the timeout for the ULR Phosphorus checker is 3 minutes - if you dilly dally opening the packet, or adding the reagent to the tube, you can run yourself out of time and have the meter turn off. With the ULR Phosphate checker, that timeout is 7 minutes. This makes it hugely more user friendly.


The difference in accuracy/precision between the two models is smaller than the difference in accuracy/precision between individual meters - because Hanna's quality control in the aquarium space is not so good.

I have never understood why they do not have the same time out timer on all units.

 

[Miami Reef]

I have never understood why they do not have the same time out timer on all units.

They initially made the phosphorus checker, but they realized their mistake with the short timer, so they came out with the phosphate checker and corrected that issue, but never updated the initial model.

 

[BitReef]

They initially made the phosphorus checker, but they realized their mistake with the short timer, so they came out with the phosphate checker and corrected that issue, but never updated the initial model.

I reached out to them for an update or exchange and they denied both.

 

[LeftyReefer]

I reached out to them for an update or exchange and they denied both.

Which seems like the correct course of action all things considered.

 

[Reefing_addiction]

The specifications from Hanna claim the phosphorus checker is more accurate than the phosphate checker for measuring phosphate.

Old thread - but what’s YOUR opinion?