Neptune Systems EB4 & A3 Apex Jr. Controller System Bundle

Overview

The Neptune Systems A3 Apex Jr. provides essential monitoring and control for aquarists who want reliable automation without unnecessary complexity. Designed as an affordable entry point into the Apex ecosystem, the Apex Jr. tracks critical parameters, alerts you to potential problems, and controls up to four pieces of equipment through the included Energy Bar 4. With WiFi connectivity and access to the Apex Fusion app, you can monitor and manage your aquarium from anywhere in the world.

Key Features

• Essential Monitoring – Keep tabs on temperature, pH, water level, and leaks.

• Reliable Equipment Control – Energy Bar 4 features four individually controlled outlets with soft-start technology.

• WiFi Connectivity – Built-in wireless connection to the Apex Fusion cloud for real-time monitoring and control.

• User-Friendly Fusion App – Customize dashboards, log parameters, and receive instant alerts.

• Expandable Ecosystem – Add modules like PM2 for salinity monitoring or DOS QuietDrive for precision dosing.

• Lab-Grade Probes – Includes double junction pH probe and temperature probe for accuracy and stability.

• Protect Against Leaks – Comes with MOS Magnetic Optical Sensor and LD-2 Leak Detection Sensor for safety.

A3 Apex Jr. System Components

A3 Apex Jr. Base Unit

• Tracks temperature, pH, water level, and leaks.

• Equipped with two AquaBus ports for connecting to the EB4 and additional modules.

Energy Bar 4

• 4 independently controlled outlets (3 rated at 8A, 1 rated at 12A @ 120V AC).

• Built with 16-gauge powder-coated aluminum for durability.

• Reports power usage to the Apex Controller for intelligent load management.

• Soft-start function protects pumps and powerheads.

MOS Magnetic Optical Sensor

• Low-profile water level sensor that detects wet/dry states using infrared light.

• Mounts on reservoirs or sump walls up to 1/4" thick.

LD-2 Leak Detection Sensor

• Weighted full-size probe designed for flat surfaces like floors or inside aquarium cabinets.

• Instantly notifies your Apex if water is detected.

Probes

• Temperature Probe – Detects and alerts when temperature leaves safe range.

• Double Junction pH Probe – Long-lasting accuracy with less frequent calibration.

Specifications

• Head Unit Dimensions: 4.75" L x 5.25" H x 3.25" W

• Energy Bar 4 Dimensions: 10" L x 6.5" H x 2.25" W

• Connectivity: WiFi

• Outlets: 4 (individually controlled)

What’s Included

• (1) A3 Apex Jr. Base Unit

• (1) Power Supply

• (1) Temperature Probe

• (1) Double Junction pH Probe

• (1) MOS Magnetic Optical Sensor

• (1) LD-2 Leak Detection Sensor

• (1) EB4 Energy Bar 4

• (1) Set of Calibration Solutions (pH 7 & 10)

• Mounting Screws

• Getting Started Card