The Neptune Apex pH or ORP Probe Module, also known as the PM1, is an essential expansion for your existing Neptune Systems Apex or Apex Lite AquaController. This module allows you to significantly enhance your system's monitoring capabilities by adding a dedicated port for either a pH or ORP probe, enabling precise tracking of these critical water parameters within your reef aquarium. Beyond just parameter monitoring, it also provides an additional temperature port and six versatile I/O switch inputs, expanding the range of peripherals and sensors you can integrate into your Apex setup.

Key features of the PM1 include its ability to monitor pH or ORP and subsequently control outlets based on the readings from the connected probe, offering robust automation potential. It supports automatic temperature compensation for pH when an optional temperature probe is connected, ensuring accuracy. Galvanic isolation is built-in for reliable and precise probe readings. The six digital inputs are perfect for connecting float switches, water leak sensors, or feed buttons, providing comprehensive environmental oversight. The module connects and is powered via AquaBus, offering plug-n-play setup, firmware upgradeability, full data logging and graphing through the Apex Base Module, and features two AquaBus ports for flexible system expansion.

This probe module is ideally suited for saltwater aquarium hobbyists who already own an Apex or Apex Lite AquaController system and wish to expand their monitoring and automation capabilities. It's perfect for those who require additional pH or ORP monitoring points beyond what their base unit offers, or for enthusiasts looking to integrate multiple leak detectors, ATO sensors, or custom input switches to create a more resilient and automated reef environment. Its ease of integration and comprehensive feature set make it a valuable addition for any serious reefer aiming for optimal tank stability and control.