Salinity:Which method of measuring do you trust more

[Thales]

A just calibrated refractometer or a pinpoint salinity monitor that was calibrated with two different solutions?

 

[jimsar]

I use a refractometer. I guess I can also use my beerkmaking hydrometer.

I'll never use a plastic float hydrometer again. Mine is so inaccurate. In restrospect, I loaned it to Panzer Tank the other week. It's now his, as far as I'm concerned.

 

[Raddogz]

Refractometer is what I use. I can't comment on the salinity monitor as I have never used one.

 

[badpacket]

Are you calibrate with RO/DI?

 

[bareefers]

I used a salinity monitor but its tricky becuse of the stray voltage, I prefer a float type.

 

[Thales]

Hey guys, thanks for the responses, but I'm not looking for opinions on which to choose. I have both and they give different readings even after they have both been calibrated. I am trying to decide which to trust.

Can someone bring their refractometer to the meeting?

 

[capescuba]

Am I the only one living in the dark ages then with a hydrometer?

 

[jedininja]

i would tryst the refractometer calibrated with distilled water most. Electronic can be off, but physics cant be. a certain sg will bend the light at a certain angle, no changing that.

How much do your results differ?

Capesuba, a refractomere is probably one of the best investments I ever made in this hobby.

 

[Thales]

1.020 with the probe, 1.026 with the refractrometer

 

[vapormd]

I'm surprised there's that much of a difference between the two! IMO, I'd try and borrow a few refractometers, calibrate them with RO/DI and then see how they compare. Do both the salinity probe and refractometer have temp compensations?

 

[bareefers]

I ditched my pinpoint unit in favor of a refractometer.

 

[bareefers]

i would tryst the refractometer calibrated with distilled water most. Electronic can be off, but physics cant be. a certain sg will bend the light at a certain angle, no changing that.

How much do your results differ?

Capesuba, a refractomere is probably one of the best investments I ever made in this hobby.

I concur on all statements.. prefer physics over electronics and our refractometer was one of the best investments to date

 

[jedininja]

Wow, that is a huge difference. So what does the hydrometer say?

 

[bookfish]

I agree w/ jedi, the physics behind a refracto are pretty straightforward.

 

[Thales]

Jim - let me borrow your Refractro!

 

[jedininja]

Hey Rich, bring a sample of your water and I'll bring my refractometer.

 

[Thales]

Sweet!