You have to turn the Hanna salinity in circles underwater to get the air out of it. Then allow it to stabilize just like you were taking a thermometer reading…
I also just got the hanna, tested reference solution in a drinking glass and noticed air bubbles forming on one of the graphite sensor which lowered the salinity until the bubble releases and suddenly salinity shot up. This process repeated itself. If this is normal, I can imagine you have to keep the tester moving to get good results
On the Hanna handheld you're supposed to tap it when you're in the calibration solution so there is no air bubbles. You're also supposed to put it in the water shake it and then re put it in the water when you're testing the water so there's also no air bubbles.
Дима, спасибо за видос. Все как всегда на высоте! Очень полезно и информативно получилось. Я вот буквально пару дней получил hydrometer и очень им доволен. Некий золотой стандарт. Правда мерять немного геморно получается. Что скажешь о пробнике от Apex контролера? В моем случае он завышал аж на три единицы (ppm), что мне кажется критично. Хотя делал калибровку и проверял на предмет «завоздушивания» самого пробника. Не уж то ли бесполезная функция…
я с этим Апексом боролся тоже - там принцип, как и у Ханны - иногда работает, иногда нет, и вот это занижение или завышение не постоянно - как мы уже убедились, у меня он стоит на аквариуме, но я за ним не слежу и ему не доверяю особо - он хорош просто показать, когда совсем что-то не туда пошло. Хотя у моего приятеля он работает не плохо. Да, и еще там очень важно где находится пробник и даже где проходит сам кабель, потому что помехи могут на него влиять.
Everybody must read the specs and understand the precision and accuracy of each measurement instrument. It is impossible to compare apple with orange. The calibration reference has an accuracy, the instrument another accuracy and we are bias with what result we want to have.
You have to turn the Hanna salinity in circles underwater to get the air out of it. Then allow it to stabilize just like you were taking a thermometer reading…
I also just got the hanna, tested reference solution in a drinking glass and noticed air bubbles forming on one of the graphite sensor which lowered the salinity until the bubble releases and suddenly salinity shot up. This process repeated itself. If this is normal, I can imagine you have to keep the tester moving to get good results
Very strange, I don' think I've observed this.
Thanks, I'll give it a try. Appreciate your suggestion.
Had all of these and best i use now is the Tropic Marin hydrometer .
Yep, solid truth.
Purchased a laboratory grade glass hydrometer. I've been using it for about 4 years accurate and fast! Totally happy with it.
And no calibration needed! :)
What company is the hydrometer?
Great video!
Great job Demetri (hopefully spelled that right).
Good job
just got a glass tropic marin hydrometer because I'm not trusting refractometers at the moment (specific gravity)
Those are the best!
Exactly! That what I did just a few days ago!
On the Hanna handheld you're supposed to tap it when you're in the calibration solution so there is no air bubbles. You're also supposed to put it in the water shake it and then re put it in the water when you're testing the water so there's also no air bubbles.
Fair point, appreciate your insight. Will try that next time.
I hear a lot of people say the cybon is good holds calibration I also have the Milwaukee you should put 3 drops of water on the cybon anyway ice video
Дима, спасибо за видос. Все как всегда на высоте! Очень полезно и информативно получилось. Я вот буквально пару дней получил hydrometer и очень им доволен. Некий золотой стандарт. Правда мерять немного геморно получается. Что скажешь о пробнике от Apex контролера? В моем случае он завышал аж на три единицы (ppm), что мне кажется критично. Хотя делал калибровку и проверял на предмет «завоздушивания» самого пробника. Не уж то ли бесполезная функция…
я с этим Апексом боролся тоже - там принцип, как и у Ханны - иногда работает, иногда нет, и вот это занижение или завышение не постоянно - как мы уже убедились, у меня он стоит на аквариуме, но я за ним не слежу и ему не доверяю особо - он хорош просто показать, когда совсем что-то не туда пошло. Хотя у моего приятеля он работает не плохо. Да, и еще там очень важно где находится пробник и даже где проходит сам кабель, потому что помехи могут на него влиять.
I find my Milwaukee to be quite accurate and Milwaukee pH monitors and controllers are far superior to Pinpoint. I threw my Pinpoint's in the trash.
I've learned that the tick with Milwaukee is to give it at least 30 seconds before taking the actual measurement.
@@TreasureCorals Never tired that, I’ll give it a go.
Everybody must read the specs and understand the precision and accuracy of each measurement instrument. It is impossible to compare apple with orange. The calibration reference has an accuracy, the instrument another accuracy and we are bias with what result we want to have.
Agreed, but in the end - I want a way to just check my salinity and know that it is in a good range.
which digital refractometer would you recommend? Hanna or Milwaukee?
Hanna for sure
@@TreasureCorals how come? I thought u said the milwaukee is spot on if you wait for one min.
@@federicomanglavite9897 correct, and with Hanna digital I did not have to wait at all
consistency is more important than accuracy. this isnt building an airplane.
Wise words
Why didiny you test with a glass hydrometer also?
I don't have one, but am in the market for one.
@@TreasureCorals candy corals had them
@@steveplays5408 I'll pay Afnan a visit then