Expansion Module for AquaController Apex System
The Neptune Systems AquaController Apex PM1 pH/ORP Probe Module expands the monitoring and control capabilities of your AquaController Apex controller system.
- Provides additional pH or ORP and temperature probe ports
- Enables monitoring of an additional aquarium or expands existing monitoring capabilities
- Includes six I/O switch inputs for ATO, feed buttons, float switches, water sensors, flow sensors, and more
| Feature | Description |
|---|---|
| Probe Ports | pH or ORP and temperature |
| I/O Switch Inputs | 6 available inputs |
| Compatibility | Works with all AquaController Apex controller systems |
FAQ
Can this module be used with any AquaController Apex system?
Yes, the PM1 module is compatible with all AquaController Apex controller systems.
Does the module support both pH and ORP measurements?
Yes, it provides dedicated ports for pH or ORP measurements, along with temperature monitoring.
How many additional probe ports does the module offer?
The module provides additional pH or ORP and temperature probe ports, enabling expanded monitoring options.

Brian Black –
Installed the PM1 module on my Apex system and it worked perfectly. Added two more pH probes and a temperature sensor without any issues. The I/O inputs are useful for connecting a float switch and a feed button. Easy to install and integrates smoothly with the existing setup.
Matt Walker –
Great expansion for my aquarium setup. I used it to monitor a second tank and added a flow sensor. The module fits well and the connections are secure. A bit more complex to wire than the base unit, but the documentation helps.
Christian Thomson –
This module solved my need to monitor multiple tanks. The additional probe ports are reliable and the I/O inputs allow me to automate feeding and water level checks. No delays or errors during operation.