Neptune Systems PM1 Module – pH ORP Temp Probe Expansion for Apex System

The Neptune Systems PM1 Module is a pH/ORP probe expansion module for Apex aquarium controllers. Designed for reef keepers who want precise control and advanced water chemistry monitoring, the PM1 allows you to track pH, ORP, and temperature in a second system, calcium reactor, or quarantine tank. Compact and easy to integrate, it enhances the intelligence of any Neptune Systems Apex setup.

✨ Key Features and Benefits
• pH or ORP Probe Port – Monitors a second pH or ORP source independently
• Temperature Monitoring – Includes an additional port for temp sensors (sold separately)
• Apex Compatible – Seamless plug-and-play expansion for all Neptune Systems Apex models
• Ideal for Reactors – Monitor and control pH inside calcium reactors or alternate systems
• Automated Stability – Enables advanced alerts and automation based on pH or ORP readings
• Compact Design – Small footprint allows for flexible mounting and cable routing
• Reliable Performance – Industry-standard accuracy trusted by serious reef aquarists

📦 What’s Included
• 1x Neptune Systems PM1 Probe Module
• 1x AquaBus cable
• Mounting hardware
• (Probes sold separately)

🛠️ How to Use

1. Connect the PM1 to your Neptune Systems Apex using the included AquaBus cable.
2. Insert a compatible pH or ORP probe (not included).
3. Optionally add a temperature probe to the temp port.
4. Use Apex Fusion to configure monitoring, alerts, and automation.
5. Mount the unit securely in your control cabinet or stand.

📐 Specifications
• Ports: 1x pH/ORP probe, 1x temperature sensor
• Communication: AquaBus
• Compatibility: Apex, Apex EL, Apex Pro
• Dimensions: Compact module (approx. 3" x 2")
• Power: Supplied via AquaBus (no additional power needed)

✅ Conclusion
The Neptune Systems PM1 Module is an essential expansion for aquarists who want to monitor multiple systems or fine-tune control of calcium reactors. Whether you're managing a quarantine tank, refugium, or secondary pH zone, the PM1 adds professional-grade monitoring to your Apex ecosystem.