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Neptune Systems

Neptune Systems APEX Double Junction Lab Grade PH Probe

NS1197

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What is the difference between double junction and single junction probes?

Single junction probes put the reference electrode in direct contact with aquarium water. Over time, the junction will slowly leak aquarium water into the electrolyte which changes the accuracy of the probe and requires more frequent calibrations.

Double junction probes place a second vessel inside the main electrolyte with a second internal junction. The means that even when the aquarium water eventually begins to make its way in the first compartment, it still has to go through the second junction to contaminate the electrolyte surrounding the reference electrode.

Please Note: We suggest calibrating probes every 60-90 days for reliable and stable readings. Calibration fluids are sold separately.

Manufacturer Info

Neptune Systems Aquarium Supplies
Neptune Systems is one of the world’s leading manufacturers of aquarium controllers. The company was founded in 1995 for the purpose of developing affordable water quality monitoring and control instrumentation. Their engineering team has extensive expertise in computer hardware and software system design as well as a background in water quality analysis. Neptune Systems uses these finely-honed engineering skills to develop innovative monitoring and control solutions for use in reef and fresh water aquariums, aquaculture tanks, hydroponics systems and general laboratory use. Neptune Systems is best known for their AquaController line. The company is known for their innovation and customer centricity.

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9 Questions
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Q
Does this come with calibration fluid?
Asked : Apr 11, 2019
By : Brandon, GA
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A
Hello Brandon. No, to ensure freshness calibration liquid is not included with the probe. You can purchase the calibration solutions here: https://tinyurl.com/y3dxw55v Cheers!
Answered : Aug 09, 2019
By : Ivan G.
 
Q
PM1 needed?
I have an apex JR. Do i need this to add to my temp probe?
Asked : Dec 26, 2017
By : Finis
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Overall, others give this:

  • 4.8

5 Reviewers (100%) would recommend this

Overall Rating:

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5  Star
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5
5.0
Nice probe

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PROS
Robustness
CONS
A bit pricey
REVIEW
I bought one for my calcium reactor and it's been working great ever since.
  • 1
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5
5.0
Works as its supposed to
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REVIEW
Seems accurate and is very easy to use. Worth the upgrade over the other probes.
  • 1
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5
5.0
Works

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REVIEW
Works great - I assume it is accurate, however I don't have anything to verify that with other than calibration fluid, so I just trust that it is reporting accurate info.
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4
4.0
Neptune

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REVIEW
great product
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5
5.0
Accurate Probe

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REVIEW
I own two of these pH probes hooked to two PM1 modules. I liked that they came shipped with a cap containing storing fluid to keep the probe wet until purchase. They were easy to calibrate and are very accurate. Easy to install, fit nicely into the apex probe holder. Another well built product from ...Read More
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Overall, others give this:

  • 4.8

5 Reviewers (100%) would recommend this

Overall Rating:

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