Hanna Marine Nitrate Checker HI781

IamJoHo

Active Member
View Badges
Joined
Mar 8, 2019
Messages
126
Reaction score
73
Location
Westerville, OH
Rating - 0%
0   0   0
Anyone heard any info on this? Wondering when this might be released. I cant find much information about it. https://www.hannainst.com/marine-nitrate-checker-hi781.html

HI781-Front__67689.1590587741.220.290.jpg
 

taricha

5000 Club Member
View Badges
Joined
May 22, 2016
Messages
6,484
Reaction score
9,996
Rating - 0%
0   0   0
Range0.00 to 5.00 ppm (as NO₃ – )
Resolution0.01 ppm
Accuracy @ 25°C/77°F±0.25 ppm ±2% of reading @ 25 °C (77 °F)

Lol at that resolution vs the accuracy.
They aren't wrong, just easily confusing.
 

Miller535

Valuable Member
View Badges
Joined
Dec 11, 2019
Messages
2,203
Reaction score
1,937
Location
Pittsburgh, Pennsylvania
Rating - 0%
0   0   0
I have been waiting for this to come out. But a little disappointed that the range is only 0-5ppm. Would only really be useful to someone who is running a ULN system. Which is not most of us. Kind of wish it would go 0-10ppm.
 

Joedubyk

Well-Known Member
View Badges
Joined
Aug 19, 2019
Messages
795
Reaction score
1,040
Rating - 0%
0   0   0
salifert is sipmly the best in my experience. it has proven to be really close in accuracy takes 3 minutes, cheap, and at least has a good range. this seems ONLY useful for ULNS
 

BZOFIQ

2500 Club Member
View Badges
Joined
Jul 31, 2014
Messages
4,663
Reaction score
3,957
Location
NYC
Rating - 100%
8   0   0
I missed the 0-5ppm initially and have been awaiting release. Now that I know I'll pass.
 

intricate_reefer

Valuable Member
View Badges
Joined
Aug 12, 2011
Messages
1,099
Reaction score
1,924
Location
New Bern, NC
Rating - 0%
0   0   0
Yes the 5ppm Max is disappointing. I’m sure they will have dilution instructions to get higher readings. Hope they just come out with a normal ranged unit as well. Maybe up to 15-20ppm.
 

nereefpat

7500 Club Member
View Badges
Joined
Apr 20, 2018
Messages
7,929
Reaction score
8,687
Location
Central Nebraska
Rating - 0%
0   0   0
For those upset about the 0-5 range, why not simply dilute your sample 50/50? Then you would have 0-10.
 

Randy Holmes-Farley

Reef Chemist
View Badges
Joined
Sep 5, 2014
Messages
66,582
Reaction score
62,881
Location
Arlington, Massachusetts, United States
Rating - 0%
0   0   0
Dilution may not be trivial.

Nitrate tests typically suffer from substantial chloride interference and somehow likely need to be diluted with the same chloride level water without nitrate.
 

Randy Holmes-Farley

Reef Chemist
View Badges
Joined
Sep 5, 2014
Messages
66,582
Reaction score
62,881
Location
Arlington, Massachusetts, United States
Rating - 0%
0   0   0
This is what the Hach test kit says about it:


Chloride concentrations above 100 mg/L cause low results. The test can be used at high chloride
concentrations (seawater) if a calibration is made with standards that have the same chloride
concentration as the samples (refer to Seawater calibration on page 5).

FYI, seawater is about 19,000 ppm chloride
 

piranhaman00

2500 Club Member
View Badges
Joined
Jun 24, 2019
Messages
4,846
Reaction score
4,802
Rating - 0%
0   0   0
Saltwater which has to be tested and confirmed to be void of nitrates. yeah.....no

Yes just freshly made saltwater lol

SaltwaterQuairum said that Hanna told them (he said she said?) that the range can be extended to 0-50ppm with dilution
 
Back
Top