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Neptune Systems PM1 pH/ORP Temp Probe Module

$199.95

Expand Your Apex Monitoring Capabilities

Available on back-order

The PM1 Module is a compact, plug-and-play expansion device for any Neptune Apex system, providing an additional pH or ORP probe port, a temperature probe port, and an I/O port for connection to external switches via the Breakout Box.

Ideal for multi-tank setups, calcium reactors, or advanced automation needs, the PM1 allows aquarists to monitor and respond to more environmental variables within the Apex Fusion ecosystem.


Key Features

  • Compatible with all Apex Controllers (A2 and A3 Series)

  • Use the probe port for pH or ORP (not both simultaneously)

  • Includes temperature probe port

  • I/O port allows connection to the Breakout Box (sold separately)

  • 2x AquaBus ports for easy daisy-chaining with other modules

  • Plug-and-play setup via Apex Fusion


pH / ORP Monitoring

The main probe port on the PM1 can be used for either:

  • A pH probe, to monitor a second tank or equipment like a calcium reactor

  • An ORP probe, for ozone system control or general water quality tracking

Use cases include:

  • Monitoring pH inside a calcium reactor to automate COâ‚‚ flow

  • Adding ORP monitoring to automate an ozone generator

  • Running multiple tanks from one Apex controller with separate pH probes


Temperature Monitoring

A dedicated temperature probe port allows:

  • Tracking of a second aquarium

  • Monitoring ambient temperature in your cabinet or room

  • Redundant temperature sensing for safety or environmental profiling


I/O Port for External Switches

The integrated I/O port allows connection to the Neptune Breakout Box (sold separately), giving you the ability to add:

  • Float switches (e.g. for ATO or sump monitoring)

  • Push buttons (e.g. to activate feed modes)

  • Magnetic reed switches (e.g. for cabinet door alerts)

Up to six switches can be connected through the Breakout Box to trigger custom automation routines in Apex Fusion.


Specifications

  • Probe Ports:

    • 1x pH or ORP (selectable)

    • 1x Temperature

  • Expansion Ports:

    • 1x I/O port

    • 2x AquaBus ports

  • Connectivity: Apex Controller (via AquaBus)


What’s Included

  • 1x PM1 Module

  • 1x 0.9 m (3 ft) AquaBus Cable

    Note: Probes, temperature sensors, and the Breakout Box are sold separately. Requires a Neptune Apex Controller.

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