Equipment Digital salinity probes

[djangom]

Hi all

I was wondering if anyone has any experience w stand alone digital salinity probes (non apex).

Like this one…

American Marine Pinpoint Salinity Monitor - Aquarium Plants

FeaturesPINPOINT Salinity Monitor will accurately and immediately measure the amount of salt in any marine or freshwater system. The reading is fully temperature compensated, which is difficult or impossible with nearly any commercial hydrometer. The conversion chart will precisely show the...

aquariumplants.com

 

[pecan2phat]

I had one (Pinpoint) maybe 15 years ago and it was never accurate, got rid of it within a few months.

 

[Reef Reaper]

I use one on my mixing tank. It gives me a good baseline of my salinity and I adjust it accordingly. Very happy with mine.

 

[Josh]

Salinity probes are prone to losing their calibration when they sit in water all the time. So you need to recalibrate them frequently for them to be considered reliable.

 

[ssdawood]

I had one (Pinpoint) maybe 15 years ago and it was never accurate, got rid of it within a few months.

You know Bud I also believed like you. But later in life I realized that most conductivity probes are never accurate.

If you mean consistent, even then I would say it's mostly user error that they don't get consistent reading. Air bubbles being main culprit.
I use Hanna , pinpoint conductivity, ice salinity probe and apex salinity probe.
For hobby grade all good enough. Gives you close enough reading.
Probes that are left continous have problem with bubbles. Once you shake that it's good.

Hanna amd milwaukee digital bench refractometer are best for one a day etc testing.

 

[djangom]

You know Bud I also believed like you. But later in life I realized that most conductivity probes are never accurate.

If you mean consistent, even then I would say it's mostly user error that they don't get consistent reading. Air bubbles being main culprit.
I use Hanna , pinpoint conductivity, ice salinity probe and apex salinity probe.
For hobby grade all good enough. Gives you close enough reading.
Probes that are left continous have problem with bubbles. Once you shake that it's good.

Hanna amd milwaukee digital bench refractometer are best for one a day etc testing.

 

[djangom]

Thanks for the comments. I bought the probe for $100 so I’ll see how it goes compared to my refractometer. I’ll be sure to post some notes.

 

[ssdawood]

I was making water today. So I am sharing it.
Not saying these don't have limitations. But we can reduce them
For a probe make sure you rinse it. Then dry it. Then put in beaker and shake it for no air or air bubbles.

Ice cap I don't know. But Hanna and pinpoint both calibrate their machines and you can send them in whenever you like. It comes with a calibration certificate.
Best is use multiple devices

 

[Iris]

I use the FJD refractometer.
It can measure accurately, and can connect with a mobile app to record data.

What is Refractometer | Coffee Refractometer | Salinity Refractometer-FJD

Refractometer is an optical instrument that measures the percentage of dissolved content in liquids by the refraction of light.

www.fjdretail.com