Neptune Systems PM2 Conductivity, Temperature & I/O Expansion Module

Expand Your Apex with Salinity, Temperature & I/O Monitoring

The Neptune Systems PM2 (Probe Module 2) is an expansion module that adds conductivity (salinity) monitoring, an additional temperature probe input, and six digital I/O switch inputs to your Neptune Apex Aquarium Controller. Designed for reef and marine aquariums, the PM2 provides accurate salinity monitoring while expanding your system with extra temperature sensing and external switch capabilities.

Ideal for reef keepers who require precise salinity management, the PM2 helps protect sensitive corals and marine livestock by providing real-time conductivity readings, trend analysis, and automated alerts through Apex Fusion.

Key Features

• Genuine Neptune Systems expansion module
• Dedicated conductivity (salinity) probe input
• Additional temperature probe input
• Six digital I/O switch inputs for float switches, push buttons, and other dry-contact sensors
• Real-time salinity and temperature monitoring
• Historical data logging and graphing through Apex Fusion
• Programmable alerts and automation
• Plug-and-play installation via AquaBus