Lab Grade Double Junction pH Probe - Neptune Systems

Click on image to zoom
View full size image

More Views

Lab Grade Double Junction pH Probe - Neptune Systems

100% Recommend this to a friend (1 of 1)

SKU: 210223
Please wait...


1-3 day service on orders over $249

What's this?

You could earn
370 points
($3.70 off a future purchase!)
Ships Monday

Quick Overview

Neptune Double Junction probes will out last most other traditional lab grade probes letting you go longer between calibrations, and having to purchase and replace probes less frequently. The Double Junction isolates the reference gel and probe from proteins and other organics that may otherwise precipitate and clog, shortening the lifespan of the probe.

  • Longer lasting

  • Reliable readings

  • Quality connections

  • BNC style connector


*Calibration solutions sold separately


Ask a question

Product Questions

Will this probe work the a reefkeeper lite setup?
Question by: Jim on Jul 14, 2016 2:03:00 PM
Hi Jim,
The Neptune Double Junction probes are compatible with any type of controller like the ReefKeeper Lite. All you need for your RKL unit would be a module that can accept a pH probe like the SL1 or SLX module.
If you have any other questions just let us know.
Answer by: Charlie (Admin) on Jul 14, 2016 2:55:00 PM
Do these work on the older apex systems?
Question by: Josh Avila on Jul 14, 2016 2:09:00 PM
Hi Josh,
Thanks for the question and the Neptune Double Junction probes will work with all Neptune Apex systems. All you need is an open BNC connector for a pH probe. If you are replacing an old pH probe all you will need to do is calibrate the new probe once you get it hooked up. : )
Answer by: Charlie (Admin) on Jul 14, 2016 2:49:00 PM

Full Details

Neptune's Double Junction pH Probe is compatible with any monitor or controller with a BNC style connection. If you just need to replace your worn out probe or add another you will not be disappointed with the double junction feature of these probes. Most probes have a single chamber to house the actual reference probe and fluid that can become contaminated quickly throwing off readings and requiring calibration quite often. The double junction probes have two chambers that keeps any contaminants that could possibly react with and clog the actual sensing portion of the probe.


Whats Included?

1x Double Junction Lab Grade pH probe w/ 10' cord


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



1 Item

  • Works By Jason on 1/16/2017

    Probe has a long life and can be calibrated with the apex controller to adjust for change over time. While the response time of the sensor has slowed over the years, it still works with no issues. Calibration solution is required to set the probe with the apex controller.