Neptune Systems PM1 pH/ORP, Temperature & I/O Expansion Module

Expand Your Apex Monitoring with Additional pH, ORP, Temperature & Switch Inputs

The Neptune Systems PM1 (Probe Module 1) is an expansion module that adds an extra pH or ORP probe port, temperature probe port, and six digital I/O switch inputs to your Neptune Apex Aquarium Controller. Ideal for advanced aquarium automation, the PM1 allows you to monitor additional water parameters and connect external switches for applications such as automatic top-off (ATO), sump level monitoring, leak prevention, and equipment control.

Whether you're running a calcium reactor, kalkwasser reactor, quarantine system, or a second aquarium, the PM1 provides the flexibility to expand your Apex system with accurate monitoring and enhanced automation.

Key Features

• Genuine Neptune Systems expansion module
• Adds one pH or ORP probe input (BNC connector)
• Dedicated temperature probe input
• Six digital I/O switch inputs for float switches, push buttons, and other dry-contact sensors
• Real-time monitoring through Apex Fusion
• Plug-and-play installation via AquaBus
• Compact and easy-to-mount design