Red Sea Refractometer

[AllSignsPointToFish]

Anyone have any experience with these? I've been thinking of getting one, but I've read some reviews where the instrument will not hold zero.

 

[Lenny_S]

Anyone have any experience with these? I've been thinking of getting one, but I've read some reviews where the instrument will not hold zero.

I have one. The calibration is sensitive to temperature changes. So I just store it in my stand where the temperature stays pretty constant. I check the calibration every time I use it, but rarely need to adjust it.
One odd thing is it gives an S.G. scale on the left and ppt on the right. The 0 line for each of them is different. I contacted RedSea and they said that was correct and to calibrate/0 it to the ppt scale and it would measure near seawater correctly.

 

[AllSignsPointToFish]

I have one. The calibration is sensitive to temperature changes. So I just store it in my stand where the temperature stays pretty constant. I check the calibration every time I use it, but rarely need to adjust it.
One odd thing is it gives an S.G. scale on the left and ppt on the right. The 0 line for each of them is different. I contacted RedSea and they said that was correct and to calibrate/0 it to the ppt scale and it would measure near seawater correctly.

Hmmm....gives me heartburn! haha. I'm thinking about springing for the Milwaukee, but my Amazon order is already ridiculous! LOL

 

[Lenny_S]

Too funny... I think it's pretty much like any refractometer. Milwaukee and the like is a whole different league... Definitely hear you about the expense.