Hanna ULR Phosphorus reads zero

[amt68]

Has anyone had any problems with there checker only reading zero? I have had the meter about a year with no issues. I'm using a new reagent set. I've taken about 5 test and all have read zero except one that showed 11. I have replaced the batteries with not help. I suspect It's the reagent but I wanted to see if anyone has had this issue before I order new reagents. Lot H006. Exp 03/2014

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[Chompers]

Since it started with the new reagents, I'm in agreement with you that they are probably the culprit. Double check that the reagent box says phosphorous and not phosphate. They aren't interchangable with the readers.

Also check to see if they are low range (LR) or high range (HR). If you have the old box or an old wrapper, compare the product numbers.

 

[flatlander]

Did u ever get this resolved? Mine is doing the same thing.

 

[blesk]

i have the same problem

 

[MattL22]

Same issue here ! I got rid of mine! Junk !

 

[FaviaFreak]

I've noticed the same thing

 

[flatlander]

That makes me very sad.

 

[Sahin]

I have the Hanna ULR Phophorus meter and I must say it is a very good unit that produces consistent results. It could be a bad batch of reagents or it could be that you guys have a very low nutrient level and if for example you utilise carbon dosing and heavy GFO use, that your phosphates are below the detection level of this photometer. I started cycling my rocks about a month ago and have measured the phosphate level (converted from phosphorus) to fall from 0.03 to lower lower than 0.01ppm. I dosed Prodibio and as expected I saw the general trend of the phosphate level dropping over time. To check if your meters are working, test someone elses water or use your tank water to rinse some frozen fish food and let the debris settle (filter the water if possible), this phosphate loaded water should give a reading. End of the day, if the meter is faulty contact Hanna. My first unit gave eratic results, I sent the whole lot to Hanna and they sent a replacement unit back with an box of extra reagent as well.

 

[amt68]

Update. I spoke with Hanna on 1-13-12. And they did confirme a issue with lot 006. They asked for me to email a copy of regent receipt. 1-18-12 received replacement 25 pack kit.
Hanna Tech support: 1-800-426-6287 ext. 34
Email. [email protected].
Hope this helps.
Bob

Bob's Phone

 

[Joe Knows Reefs]

I was going to suggest contacting Hanna. Pete is a great guy and I know they stand behind their products. I love the ULR Phosphorous checker over the standard PO4 checker