Neptune Systems PM2 Salinity Probe

Neptune Systems PM2 Salinity Probe Expansion Module for Apex

  The Neptune Systems Salinity Probe with the PM2 module delivers accurate, real-time salinity monitoring for reef aquariums. Built by Neptune Systems and featured under Automate & Monitor, this upgrade actively safeguards tanks against sudden shifts caused by faulty top-off units or excessive evaporation.  

Neptune Systems Probe for Accurate Aquarium Salinity Readings

The PM2 works with the Neptune Systems Probe to monitor and control conductivity in aquariums. Consequently, aquarists can track salinity across four ranges with accuracy, ensuring healthy reef conditions at all times.

• Provides real-time monitoring of salinity and temperature
• Integrates with all Apex controller systems
• Allows flexible customization with probe sold separately
• Includes 3′ AquaBus cable for straightforward connection

  Within the Probes category, the PM2 not only supports conductivity measurement but also adds temperature tracking and I/O expandability. As a result, this aquarium salinity probe helps aquarists maintain stability and avoid costly livestock losses while integrating seamlessly into existing Apex systems.  

Salinity Probe Aquarium Module Features

This salinity probe aquarium module delivers both control and expandability. In addition, galvanic isolation ensures consistent probe readings, while plug-and-play technology enables quick recognition by Apex systems without extra setup steps.

• Supports six digital inputs for float switches or leak alarms
• Offers complete data logging through the Apex base module
• Expands up to 240 AquaBus modules for larger systems
• Displays active monitoring status with LED indicator

Extra Connectivity with the Neptune Systems Salinity Probe Module

Beyond reliable salinity tracking, the PM2 also includes a temperature probe port and dual AquaBus connectors for daisy-chaining. Therefore, aquarists can expand monitoring functions across complex setups without sacrificing simplicity.

Specifications — Neptune Systems PM2 Salinity Probe Module

• Measurement Ranges: 0–900 µS/cm, 0–9.0 mS/cm, 0–90.0 mS/cm, 0–50 ppt
• Dimensions: 4.5" L × 3.5" H × 1.25" W
• Inputs: Six digital switch inputs for ATO or safety sensors
• Ports: Two AquaBus, one pH/ORP or salinity probe, one temperature probe

Frequently Asked Questions About the Neptune Systems Salinity Probe

Does the Neptune Systems PM2 Salinity Probe work with every Apex model?

Yes, the PM2 connects with all Apex controllers and instantly appears in Apex Fusion once installed.

Is the Neptune Systems Probe included with the PM2 module?

No, Neptune Systems sells the probe separately, which allows aquarists to choose the exact probe for their needs.

Can the PM2 monitor both temperature and salinity at once?

Yes, the module includes a port for a temperature probe alongside the salinity input, ensuring broader monitoring capabilities.

How many modules can connect to a single Apex system?

Up to 240 AquaBus modules connect to Apex, so the PM2 scales easily with growing aquarium setups.

What safety devices connect through the PM2 digital inputs?

Float switches, leak sensors, and feed buttons connect directly to the six switch inputs for increased system protection.            

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