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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
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Compatible with all Apex Controllers (A2 and A3 Series)
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Use the probe port for pH or ORP (not both simultaneously)
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Includes temperature probe port
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I/O port allows connection to the Breakout Box (sold separately)
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2x AquaBus ports for easy daisy-chaining with other modules
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Plug-and-play setup via Apex Fusion
pH / ORP Monitoring
The main probe port on the PM1 can be used for either:
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AÂ pH probe, to monitor a second tank or equipment like a calcium reactor
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An ORP probe, for ozone system control or general water quality tracking
Use cases include:
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Monitoring pH inside a calcium reactor to automate COâ‚‚ flow
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Adding ORP monitoring to automate an ozone generator
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Running multiple tanks from one Apex controller with separate pH probes
Temperature Monitoring
A dedicated temperature probe port allows:
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Tracking of a second aquarium
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Monitoring ambient temperature in your cabinet or room
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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:
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Float switches (e.g. for ATO or sump monitoring)
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Push buttons (e.g. to activate feed modes)
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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
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Probe Ports:
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1x pH or ORP (selectable)
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1x Temperature
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Expansion Ports:
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1x I/O port
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2x AquaBus ports
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Connectivity:Â Apex Controller (via AquaBus)
What’s Included
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1x PM1 Module
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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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