Neptune Systems

PM1 pH/ORP Probe Module

In stock

- +

Add the pH/ORP Probe Expansion Module to your Apex Neptune System.

  • Module has extra Temp Probe port
  • I/O Switch Inputs for ATO, feed buttons, leak alarms, etc.
  • Monitor multiple tanks
  • Galvanic Isolation for accurate and reliable probe readings


Features of the Neptune Systems pH/ORP Expansion Module:

  • Monitor and Control pH or ORP and temperature
  • 6 digital inputs for float switches, water on floor sensors, pressure sensors, etc
  • Full datalogging support in Apex Base module
  • Up to 240 AquaBus modules can be added to the Apex system
  • Plug and Play - Automatically recognized when installed into the system
  • 2 AquaBus connectors for flexible expansion via AquaBus
  • Led Status Indicator
  • Upgradeable firmware
  • Compatible with all Apex systems
  • Galvanic Isolation for accurate and reliable probe readings
  • Comes with 3′ AquaBus cable
More Information
SKU 207494
UPC 696859110979
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Product Questions

Does this unit include an aquabus cable?
Question by: Christopher Penrod on Dec 14, 2021, 2:21 PM
Thanks for reaching out. yes. The PM1 includes a 3' Aquabus cable.
Answer by: William Glenn (BRS Staff) on Dec 16, 2021, 12:41 PM
I would like to add a second ph probe and my EB8 has no available aquabus slots. Can the aquabus connection be made to an open slot on the Apex unit?
Question by: Russ Feilzer on Nov 15, 2016, 2:22 PM
Great question! You can plug this module into any open Aquabus port. If you have an open one on the Apex Head unit, you can utilize it. :-)
Answer by: Randy on Nov 15, 2016, 2:51 PM

Does the module come with a standard probe? Or do I have purchase it separately?
Question by: Robert on May 8, 2016, 4:19 PM
Great question!
This will only include the Module itself without the probes which are sold separately. Feel free to let us know if you have any further questions!
Answer by: Connor on May 10, 2016, 6:03 PM
Is this compatible with the Apex Jr?
Question by: Kenyi on Jul 30, 2014, 1:39 PM
Hi Kenyi,
It sure is. The only detail is that Apex Jr has a 5 module maximum, so if you already have 5 modules, then you cannot add any more (PM1 or any other type). If you don't already have 5 modules, then you can add it no problem.
Answer by: Bulk Reef Supply on Jul 30, 2014, 1:39 PM
can i use a tenp probe on this too
Question by: jordan m on Jan 3, 2014, 5:01 PM
Hi Jordan,
The PM1 does come with a port for an additional temperature probe as well (probe sold separately).
Answer by: Bulk Reef Supply on Jan 3, 2014, 5:01 PM