Apex Salinity Calibration fluid

jamesrb · Dec 1, 2019

Hi all,

Can I use a Hanna 35.0 calibration fluid on an apex salinity prob to calibrate it?

Thanks,
James

Gareth elliott · Dec 2, 2019

Neptune use 53,000 uS conductivity standard for their probes.
I actually have the hanna conductivity calibration fluid on hand. Its 12,880 uS

i would used the neptune conductivity packets. Also I believe temperature is very important of the calibration fluid.

jamesrb · Dec 2, 2019

Gareth elliott said:
Neptune use 53,000 uS conductivity standard for their probes.
I actually have the hanna conductivity calibration fluid on hand. Its 12,880 uS

i would used the neptune conductivity packets. Also I believe temperature is very important of the calibration fluid.

Ok, i kinda figured that, but thought I’d ask the experts! I’ll order some packets today.
Thank you for your response!!

James

Hair Algae Wizard · Dec 2, 2019

Just an FYI, don't get too frustrated trying to get the conductivity probe calibrated. It can be a process, and the probe will drift after a few days, and is good for more of an estimated salinity level, than an accurate one.

jamesrb · Dec 2, 2019

Hair Algae Wizard said:
Just an FYI, don't get too frustrated trying to get the conductivity probe calibrated. It can be a process, and the probe will drift after a few days, and is good for more of an estimated salinity level, than an accurate one.

Yes! I just experienced that!.. not a good experience though... I’m new to reefing, had a freshwater tank for 14 years, stopped for about 5 years due to a big move from Portland, OR to Georgia! Now trying out Reefing

there is a LOT to learn!

I was trusting the Apex to give me accurate readings and found out my salinity was almost 40 when it was reporting 33.6! I just about had a heat attack! I did a water change and replaced with RO water and now its 36, trying to bring it down slowly... I’ll take your advice and just use it as a reference every now and then..

Thanks for the reply!
James

ScottB · Dec 2, 2019

Yeah, I ended up just calibrating it to my tank water in the end. I have a swing arm and two VeeGee refractometers that I trust.

The APEX conductivity reading I just use as an alarm in case the ATO sticks on/off.

Hair Algae Wizard · Dec 2, 2019

jamesrb said:
Yes! I just experienced that!.. not a good experience though... I’m new to reefing, had a freshwater tank for 14 years, stopped for about 5 years due to a big move from Portland, OR to Georgia! Now trying out Reefing there is a LOT to learn!

I was trusting the Apex to give me accurate readings and found out my salinity was almost 40 when it was reporting 33.6! I just about had a heat attack! I did a water change and replaced with RO water and now its 36, trying to bring it down slowly... I’ll take your advice and just use it as a reference every now and then..

Thanks for the reply!
James

Yes, please don't use the Apex probe to base your salinity level off of! Always use a refractometer.

NicolasRoc · Jan 7, 2021

Gareth elliott said:
Neptune use 53,000 uS conductivity standard for their probes.
I actually have the hanna conductivity calibration fluid on hand. Its 12,880 uS

i would used the neptune conductivity packets. Also I believe temperature is very important of the calibration fluid.

Thanks Gareth! I was asking myself the same question since I have the Hanna calibration fluid at home and no Neptune calibration fluid. Can you please tell me where it's written that the Hanna conductivity is 12,880 uS ? I can't seem to find this information anywhere.
Cheers

Randy Holmes-Farley · Jan 7, 2021

The Hanna marine salinity tester:

Marine Salinity Tester

Hanna Instruments HI98319 Marine Salinity Tester measures conductivity (EC) to determine the salinity of natural and artificial seawater within seconds.

www.hannainst.com