Apex Conductivity probe

[phk36]

Hi, does any one use this probe ? I see it shows your salt level in another way . I have interest in it as I ordered the Apex unit over the weekend but am not sure if it any good. Please give me any pros and cons from people that have it.

 

[Englishmatt]

tagging along. I know the older version wasn't very good, but as I understand it Neptune just released a new probe...that is supposed to be decent.

 

[aleonn]

I didn't know that Neptune released a new conductivity probe, but the one I have now has been working great. Even though I calibrate it from time-to-time, I don't rely on it as an absolute measure (trust your refractometer for more exact readings). I use the Neptune cond. probe to monitor if there any big swings in salinity (for example, if the ATO were stuck on), and to send an alert if there's something out of the ordinary. It's more for peace of mind and luxury than a necessity IMO.

 

[jagr200]

What are typical probes people use?

I want an Apex but I heard you can't use a PH probe with the Jr. Is that true? If so does that mean I have to have the Lite?

 

[phk36]

I guess is is a great fail safe, I never had that in mind but its a real good point. Is there any kind of chart to convert the values ? example 1.025 is what on the probe ?

 

[jrb466]

http://www.americanmarineusa.com/salinityconversion.html

 

[dunc101]

What are typical probes people use?

I want an Apex but I heard you can't use a PH probe with the Jr. Is that true? If so does that mean I have to have the Lite?

Most people just use the pH and Temp probes. Some also like the ORP. I also thought that Neptune Systems was still working on the conductivity probes.

The APEX Jr. comes only with the temp probe. You can add a pH probe to it by buying a PM1 (75 bucks for the PM1 and $45 or $69 for the pH probe depending on standard or lab grade). I have a lab grade probe and it's been working great for 10 months. I haven't even had the need to recalibrate yet!

 

[phk36]

thank you thats easy to save to my favorites

 

[Randy Holmes-Farley]

IMO, conductivity can be a better way to measure salinity than a refractometer. I use an Orion 128 to measure salinity in my reef, as well as limewater potency. It also reads temperature, which all conductivity meters should do to make proper temp corrections.

But I would not keep such a probe in the water 24/7 because anything growing (algae, etc) or being deposited between the electrodes (air bubble, detritus, etc) can lead to a false low reading.

 

[phk36]

wow that has a high price tag !!