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Overview Keep your pH probe accurate and reliable with the Neptune Systems 7.00 pH Single-Use Calibration Packet. Over time, pH probes can drift and lose accuracy, but with regular calibration, you can ensure precise monitoring of your aquarium’s water chemistry. This convenient, pre-measured packet makes calibration simple—just tear it open and insert your probe directly into the solution. Key Features Single-Use Convenience – Pre-measured solution for quick, no-mess calibration. Accurate Results – Ensures reliable pH probe readings for better tank management. Low Point Calibration – Perfect for use as the low reference (7.0) in two-point calibration. Universal Compatibility – Works with Neptune Systems Apex and most other aquarium controllers. Routine Maintenance – Recommended every 3 months for standard probes and up to 6 months for double junction probes. Product Specifications Solution Type: 7.00 pH calibration solution Form: Single-use, tear-open packet Application: pH probe calibration for aquariums and monitoring devices What’s Included (1) 7.00 pH Single-Use Calibration Packet

Overview Show off your reefing pride with the Neptune Systems Shield Sticker. Featuring the iconic Neptune Systems logo, this high-quality sticker is perfect for personalizing your aquarium equipment, laptop, water bottle, or any smooth surface. Durable and easy to apply, it’s a simple way to add a bold touch of Neptune style to your everyday gear. Key Features Iconic Logo – Displays the Neptune Systems shield for a clean, recognizable look. Durable Material – Built to last with high-quality construction. Easy Application – Adheres smoothly to most flat surfaces. Versatile Use – Great for laptops, water bottles, gear, or aquarium equipment. Product Specifications Dimensions: 3.5" x 2.5" Design: Neptune Systems Shield Logo Material: High-quality, durable vinyl What’s Included (1) Neptune Systems Shield Sticker

Overview The Neptune Systems PM3 Module brings advanced dissolved oxygen monitoring to your Apex Aquarium Controller. Dissolved oxygen (DO) is one of the most critical—yet often overlooked—parameters in reef aquariums. With real-time monitoring, the PM3 allows you to protect your fish and corals from dangerously low oxygen levels by setting alerts and automating equipment like pumps and air stones when DO drops below safe levels. Key Features Real-Time Monitoring – Tracks dissolved oxygen levels continuously. Critical Safety Alerts – Configure Apex Fusion to send notifications or trigger equipment if oxygen falls too low. Additional Ports – Includes an extra temperature probe port (sold separately) and I/O switch inputs for added flexibility. Apex Integration – Seamlessly connects via AquaBus and is compatible with all Apex systems. Plug & Play Setup – Automatically recognized when connected to your Apex. Lab-Grade Accuracy – Works with Neptune’s high-quality dissolved oxygen probe (sold separately) featuring a replaceable membrane. Expandable Monitoring – Add float switches, leak alarms, pressure sensors, and more through the I/O port. Why Monitor Dissolved Oxygen? Fish & Coral Health – Levels below 4.5 ppm can stress livestock, and levels below 3 ppm may cause fatalities. Nutrient Control Systems – Methods like biopellets, carbon dosing, or nitrate reactors can rapidly deplete oxygen. Overstocked Systems – Extra waste and detritus consume oxygen during breakdown, creating hidden risks. Surface Gas Exchange – Ensures proper O2/CO2 balance and supports stable tank chemistry. Product Specifications Model: PM3 Dissolved Oxygen Module Connections: 1x Dissolved Oxygen probe port (probe sold separately) 1x Temperature probe port (optional probe sold separately) 6x Digital inputs for switches/sensors 2x AquaBus connectors Features: Galvanic isolation, LED status indicator, firmware upgradable Compatibility: All Apex Controllers (Apex required, sold separately) What’s Included Neptune Systems PM3 Dissolved Oxygen Module 3 ft. AquaBus Cable Note: Dissolved Oxygen probe sold separately. Apex Controller required.

Overview The Neptune Systems COR Pump Plumbing Parts provide convenient replacement fittings for the inlet and outlet connections on your COR pump. Designed to simplify maintenance and upgrades, these fittings allow you to easily swap out glued plumbing connections without the hassle of cutting or reconfiguring your aquarium’s plumbing. Key Features Direct Replacement – Designed specifically for Neptune Systems COR pump inlet and outlet connections. Maintenance-Friendly – Makes it easy to replace glued plumbing parts when updating or servicing your system. Durable Construction – Built from high-quality materials for long-lasting reliability. Easy Installation – Simple to attach for quick upgrades or replacements. Product Specifications Part Type: Inlet & outlet replacement fittings Compatibility: Neptune Systems COR pumps Use Case: Replacement or upgrade of existing glued plumbing connections What’s Included COR Pump Inlet Fitting COR Pump Outlet Fitting

Overview Expand your Apex Controller setup with the Neptune Systems Energy Bar 4 (EB4). Built for reliability and heavy-duty performance, the EB4 provides four individually controlled outlets, including one high-output port rated for 12 amps—perfect for powering chillers, large heaters, or other high-energy aquarium equipment. With its rugged aluminum construction and seamless Apex Fusion integration, the EB4 is a dependable and efficient way to scale your system. Key Features 4 Controlled Outlets – Three 8A outlets plus one 12A high-output outlet. Heavy-Duty Performance – The 12A outlet is ideal for chillers, large heaters, or other power-hungry equipment. Soft-Start Technology – Gently ramps up pumps and powerheads to extend equipment life. Durable Build – Constructed from powder-coated 16-gauge aluminum for long-lasting protection. Seamless Integration – Works directly with Apex and Apex Fusion for simple programming and remote management. Compact Expansion – Perfect when you need just a few more outlets without the cost or bulk of an additional EB832. EB4 vs. EB832 EB4 Strengths: Compact, rugged build with a dedicated 12A outlet for high-draw devices. EB832 Strengths: Offers advanced features such as per-outlet power monitoring, 1LINK ports, and built-in 24V ports. Best Use Case for EB4: When you need fewer outlets or a heavy-duty option for a single high-power device. Specifications Total Outlets: 4 (3) Rated 8A @ 120V AC (1) Rated 12A @ 120V AC Max Total Current: 15A Soft-Start: Yes Construction: Powder-coated 16-gauge aluminum AquaBus Ports: 2 Requirements: Neptune Systems Apex Controller What’s Included (1) Neptune Systems EB4 Energy Bar 4 (1) AquaBus Cable (3 ft)

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

Overview Protect your aquarium stand and equipment with the Neptune Systems Trident Drip Tray. While leaks from the Trident are uncommon, this custom-fit tray provides extra peace of mind by catching any minor drips or spills that may occur. Designed specifically for use with the Trident and Trident NP, it helps maintain a clean, safe, and organized aquarium setup. Key Features Custom Fit – Designed exclusively for the Trident and Trident NP testers. Added Protection – Catches small leaks and spills before they cause damage. Keeps Equipment Clean – Helps maintain a tidy aquarium stand. Durable Build – Made to withstand repeated use and exposure to water. Already Included with Trident NP – Available separately for Trident owners. Compatibility Neptune Systems Trident – Marine Aquarium Water Analyzer Neptune Systems Trident NP – Nitrate & Phosphate Tester What’s Included (1) Neptune Systems Trident Drip Tray

Overview The Neptune Systems FS-100 Replacement Union is a direct replacement fitting designed for use with the FS-100 1" Flow Sensor. Whether you’ve lost a part, damaged an existing fitting, or simply want a backup on hand, this union ensures a secure, leak-free connection for your flow monitoring system. Key Features Direct Replacement – Specifically designed for the Neptune Systems FS-100 1" Flow Sensor. Precision Fit – Provides a reliable, watertight seal. Durable Construction – Built from high-quality materials for long-lasting performance. Single Union – Sold individually (not in pairs). Product Specifications Connection Type: 1" BSPP > 1" Slip Union Compatibility: Neptune Systems FS-100 Flow Sensor Quantity: (1) Single Union What’s Included (1) 1" BSPP > 1" Slip Union

Overview The Neptune Systems A3 Apex Controller System gives aquarists the tools to monitor, protect, and automate their aquariums with ease. With unmatched monitoring capabilities, a powerful Energy Bar 832, and intelligent sensors, the A3 Apex empowers you to prevent problems before they become disasters. Paired with the Apex Fusion cloud app, you can track, control, and customize your aquarium from anywhere in the world. Key Features Unrivaled Control & Monitoring – Tracks temperature, pH, water level, and surface leaks while powering and monitoring equipment. EB832 Energy Hub – Includes 8 individually controlled outlets, 3x 1LINK outputs, and 2x DC24 accessory ports. Each outlet features independent power monitoring. Apex Fusion App – Cloud-based platform with drag-and-drop dashboard customization, equipment setup wizards, and real-time alerts. Critical Safety Features – Prevents overheating, sump overflows, and leaks with included MOS and LD-2 sensors. Expandable Ecosystem – Backwards compatible and customizable with modules and accessories like the Trident, DOS, WAV pumps, and salinity monitoring. Plug & Play Connectivity – Built-in WiFi and Ethernet ensure fast setup and reliable operation. Future-Proof Expandability The A3 Apex isn’t just a controller—it’s the foundation of a growing ecosystem. Add salinity monitoring with the PM2 module, or expand into automated testing with the Trident for Calcium, Alkalinity, and Magnesium. With dozens of modules and accessories available, you can build your Apex system to meet the exact needs of your aquarium now and in the future. What’s Included (1) A3 Apex Base Unit (1) EB832 Energy Bar 832 (1) Temperature Probe (1) pH Probe (1) MOS Magnetic Optical Sensor (1) LD-2 Leak Detection Sensor (1) 6' Aquabus Cable (1) Calibration Solution Set (pH 7 & 10) Mounting Screws Getting Started Card Specifications Head Unit Dimensions: 4.75" L x 5.25" H x 3.25" W Energy Bar 832 Dimensions: 10" L x 6.5" H x 2.25" W Connectivity: WiFi or Ethernet Power Bar Certifications: ETL/UL certified for aquarium use Why You’ll Love It The A3 Apex is more than an aquarium controller—it’s peace of mind. With real-time monitoring, automated safeguards, and cloud connectivity, it helps you maintain stable conditions and protect your investment. Whether you’re at home or away, Apex keeps you connected to your aquarium.

Overview The Neptune Systems A3 Apex Pro System is the most complete and advanced aquarium monitoring and control solution available for serious aquarists. With a powerful base unit, the UL-certified Energy Bar 832, industry-first sensors, and lab-grade probes, the Apex Pro gives you unparalleled insight and control over your reef tank. From monitoring temperature, pH, ORP, salinity, and water depth, to automating dosing, lighting, flow, and safety responses, the Apex Pro helps prevent disasters, optimize equipment performance, and provide peace of mind—all accessible through Apex Fusion from anywhere in the world. Key Features A3 Apex Pro Base Unit – Soft-touch finish, built-in audible alarm, and dual connectivity (WiFi & Ethernet). Full Monitoring Suite – Tracks temperature, pH, ORP, salinity* (probe sold separately), water level, and flow. Advanced Safety Sensors – Includes new LD-3 Optical Multi-Surface Leak Detector and LLS Liquid Level Sensor. Energy Bar 832 – ETL/UL-certified with 8 outlets, 3x 1LINK outputs, and 2x DC24 accessory ports. Lab-Grade Probes – Double junction probes for long-lasting, accurate pH, ORP, and temperature monitoring. Fusion Cloud Control – Easy-to-use dashboard with drag-and-drop customization, data logging, graphs, and notifications. Expandable Ecosystem – Supports up to 240 AquaBus modules for endless integration possibilities. Backwards Compatible – Works with previous Apex modules, head units, and accessories. What’s Included (1) A3 Apex Pro Base Unit (1) EB832 Energy Bar 832 (1) Temperature Probe (1) Lab-Grade Double Junction pH Probe (1) Lab-Grade Double Junction ORP Probe (1) 15" LLS Liquid Level Sensor (1) LD-3 Optical Multi-Surface Leak Sensor (1) 6' Aquabus Cable (1) Set of Calibration Solutions (pH 7 & 10) Mounting Screws Getting Started Card Product Specifications A3 Apex Pro Base Unit Ports: 4x FMM (Fluid Monitoring Module) 4x 0–10V variable output channels 6x digital switch inputs 2x AquaBus ports 2x pH/ORP probe ports 1x salinity probe port (probe sold separately) 1x temperature probe port Connectivity: WiFi & Ethernet Alarm: Built-in audible alert Dimensions: 4.75" L x 5.25" H x 3.25" W Energy Bar 832 Power Outlets: 8x 120V AC outlets (individually controlled & monitored) 1LINK Ports: 3x (for WAV, DOS, etc.) DC24 Ports: 2x (small pumps, solenoids, fans, etc.) Safety Certification: Only UL/ETL-certified aquarium power bar on the market Dimensions: 10" L x 6.5" H x 2.25" W Why You’ll Love It Prevent catastrophic failures with leak, level, and power monitoring. Automate feeding, dosing, lighting, and water changes with ease. Receive alerts via email or smartphone notifications when parameters deviate. Enjoy the confidence of lab-grade accuracy and professional-quality hardware.

Overview The Replacement Coupler for the Neptune Systems FS-50 1/2" Flow Sensor ensures a secure and leak-free connection for your flow monitoring setup. Whether you’ve misplaced a coupler or need a backup on hand, this genuine replacement part is designed to fit seamlessly with your FS-50 sensor, keeping your system running smoothly. Key Features Direct Replacement – Designed specifically for the Neptune Systems FS-50 1/2" Flow Sensor. Precision Fit – Ensures reliable, leak-free operation. Durable Build – Made from high-quality materials for long-term use. Single Coupler – Sold individually for easy replacement. Product Specifications Connection Type: 1/2" BSPP > 1/2" Slip Coupler Compatibility: Neptune Systems FS-50 1/2" Flow Sensor Quantity: Sold individually (not in pairs) What’s Included (1) 1/2" BSPP > 1/2" Slip Coupler

Overview The Neptune Systems Trident Sample Line Filter is a direct replacement part designed to maintain the accuracy and reliability of your Trident water testing system. This filter prevents debris and impurities from entering the sample line, ensuring clean water samples for consistent testing results. Key Features Direct Replacement – Compatible with the Neptune Systems Trident. Protects Accuracy – Filters out particulates to maintain precise water testing. Simple Maintenance – Easy to replace for ongoing system reliability. Essential Accessory – Keeps your Trident operating at peak performance. Product Specifications Model: Trident Sample Line Filter Compatibility: Neptune Systems Trident Water Testing System What’s Included (1) Neptune Systems Trident Sample Line Filter

Overview The Neptune Systems ATK Siphon Break is a direct replacement part for the ATK (Auto Top Off Kit). Designed to maintain the proper function of your ATO system, the siphon break prevents back-siphoning that could otherwise lead to overfilling or unwanted water transfer. Keep your ATK running safely and reliably by replacing worn or missing siphon breaks. Key Features Direct Replacement – Designed specifically for the Neptune Systems ATK Auto Top Off Kit. Prevents Back-Siphoning – Ensures safe and consistent ATO operation. Easy to Install – Quick swap-out with no tools required. Reliable Performance – Keeps your system functioning as intended. Product Specifications Model: ATK Siphon Break Replacement Compatibility: Neptune Systems ATK Auto Top Off Kit What’s Included (1) Neptune Systems ATK Siphon Break Replacement

Overview Stay warm while showing off your reefing pride with the Neptune Systems Shield Hoodie. Designed for aquarists who demand comfort and style, this hoodie features the iconic Neptune Systems shield logo on the chest. Made from soft, durable fabric in a classic Neptune gray with a bold orange logo, it’s the perfect way to represent your love for precision aquarium control—whether you’re at home, at a frag swap, or on the go. Key Features Premium Comfort – Made from high-quality, durable fabric for long-lasting wear. Iconic Logo – Features the Neptune Systems shield in bold orange. Classic Style – Neptune gray colorway with a timeless design. Versatile Wear – Perfect for aquarium hobbyists at events, shops, or lounging at home. Unisex Fit – Comfortable fit suitable for everyday use. Product Specifications Material: High-quality fabric blend (soft and durable) Color: Neptune Gray with Orange Shield Logo Fit: Unisex, standard hoodie fit Sizes: Small – 3XL (varies by availability) What’s Included (1) Neptune Systems Shield Hoodie – select size (S–3XL)

Overview Show off your loyalty to the guardian of aquariums with the Neptune Systems Shield T-Shirt. Featuring the distinguished Neptune Systems Shield logo, this shirt is perfect for Apex users who want to wear their reefing pride in comfort and style. Made with a premium tri-blend fabric, it’s soft, breathable, and durable enough for everyday wear. Key Features Iconic Shield Logo – Represents Neptune Systems and the trusted Apex brand. Premium Comfort – Crafted from a soft, lightweight poly/cotton/rayon tri-blend. Durable & Stylish – Designed for everyday wear at home, the fish store, or reefing events. Wide Size Range – Available in Small through 3XL for the perfect fit. Easy Care – Machine washable with simple maintenance. Product Specifications Material: 50/25/25 poly/combed ring spun cotton/rayon Sizes: Small, Medium, Large, XL, 2XL, 3XL Design: Neptune Systems Shield Logo on chest Care Instructions: Machine wash cold with like colors Only non-chlorine bleach when needed Tumble dry low Warm iron if necessary What’s Included (1) Neptune Systems Shield T-Shirt – select size (S–3XL)

Overview Show your reefing pride with the MXM Graphic Tee, celebrating the collaboration between Neptune Systems, AquaIllumination, and EcoTech Marine. Designed for comfort and durability, this t-shirt is perfect for everyday wear—whether you’re at home, at the fish store, or attending a frag swap. Key Features Official MXM Logo – Represents the partnership of Neptune Systems, AI, and EcoTech Marine. Comfortable Fit – Made from durable cotton for long-lasting wear. Casual Style – Perfect for aquarists who want to represent their favorite brands. Wide Size Range – Available in sizes Small through 3XL. Product Specifications Material: 100% cotton Sizes: Small, Medium, Large, XL, 2XL, 3XL Design: MXM logo on chest What’s Included (1) MXM Graphic Tee – select size (S–3XL)

Overview Show off your reefing pride with the Neptune Systems Trucker Hat. Designed with both comfort and style in mind, this classic trucker cap features a breathable mesh back to keep you cool, an adjustable snapback for the perfect fit, and a structured front panel with the iconic Neptune Systems shield patch. Whether you’re working on your aquarium or out and about, this hat keeps you looking sharp and feeling comfortable. Key Features Classic Trucker Style – Structured front panel with Neptune Systems shield patch. Breathable Mesh Back – Keeps you cool even on the hottest days. Adjustable Fit – Snapback closure ensures one size fits most. All-Day Comfort – Soft cotton sweatband for added comfort during wear. Precurved Visor – Ready-to-wear look and sun protection. Product Specifications Fit & Size: One-size-fits-most, adjustable snapback Material: 60% cotton, 40% polyester Visor: Precurved Sweatband: Cotton What’s Included (1) Neptune Systems Trucker Hat

Overview The Neptune Systems 2-Channel LED Dimming Cable lets you connect and control two independent LED color channels from your 0–10V dimmable lighting fixture to your Apex System or the VDM (Variable Dimming Module). With an RJ45 connector on one end and bare wires on the other, this cable is designed for flexible integration with your LED light, allowing Apex Fusion to manage dimming schedules, spectrum shifts, and custom lighting programs. Key Features Dual Channel Control – Supports two separate LED color channels per cable. Apex & VDM Compatible – Works with Neptune Systems Apex Controllers and the Advanced LED Dimming Module (VDM). Custom Integration – Bare wire ends allow connection according to your LED manufacturer’s specifications. Expand as Needed – For four-color LED fixtures, simply purchase two cables for full dimming control. Plug & Play Connection – RJ45 connector ensures a secure and reliable interface with Apex/VDM. Product Specifications Cable Type: 2-Channel 0–10V LED Dimming Cable Connections: RJ45 plug (Apex/VDM side) to bare wire ends (LED fixture side) Compatibility: Apex Systems & VDM Module, 0–10V dimmable LED lights Application: Lighting control (spectrum and intensity) via Apex Fusion What’s Included (1) Neptune Systems 2-Channel 0–10V LED Dimming Cable

Overview Bring the beauty of natural moonlight into your reef aquarium with the Neptune Systems Lunar Simulator Module (LSM). Designed to work with Apex Controllers, the LSM allows you to replicate true lunar cycles, helping fish and corals spawn naturally while giving your aquarium a gentle nighttime glow. Pair the LSM with Neptune’s LED strings (sold separately) for realistic and customizable lunar lighting. Key Features True Lunar Simulation – Recreates natural moon phases to promote spawning and natural behavior in fish and corals. Custom LED Strings – Available separately in 2, 3, 4, or 5 LED configurations with wide-angle (100°+) lenses for optimal coverage. Apex Integration – Seamlessly connects to any Apex system and is automatically recognized upon installation. Plug & Play Setup – Quick installation with included AquaBus cable. Flexible Expansion – Features two AquaBus connectors for daisy-chain or star topology configurations. Upgradeable Firmware – Ensures compatibility with future Apex updates. Nighttime Visibility – Provides just enough soft light to monitor aquarium activity after dark. Product Specifications Model: Lunar Simulator Module (LSM) Connections: 2x AquaBus ports Cable: Includes 3 ft. AquaBus cable Compatibility: All Neptune Apex Controllers LED Strings: Sold separately (available in 2, 3, 4, or 5 LED configurations) What’s Included (1) Neptune Systems Lunar Simulator Module (LSM) (1) 3 ft. AquaBus Cable

Overview The Neptune Systems LD-1 Low-Profile Leak Detection Probe helps protect your aquarium and home by providing early warnings of leaks or overflows. Designed for use with the FMM Module, this low-profile sensor is ideal for tight spaces or placement under carpeting—areas where the full-size LD-2 probe may not fit. With Apex integration, the LD-1 ensures you’ll be notified right away if water is detected, allowing you to take action before a small problem becomes a disaster. Key Features Low-Profile Design – Perfect for placing under carpet or in tight, hard-to-reach spaces. Reliable Leak Detection – Alerts your Apex Controller the moment water touches the sensor. Versatile Applications – Monitor for leaks near stands, sumps, skimmer cups, or reservoirs. FMM Compatibility – Connects directly to the Neptune Systems FMM Module. Flexible Protection – Complements other Neptune leak detection probes (LD-2 and LD-3) for complete coverage. Product Specifications Model: LD-1 Low-Profile Leak Detection Probe Compatibility: Neptune Systems FMM Module (not compatible with ALD Module) Application: Leak detection under carpet, in tight spaces, or hidden areas What’s Included (1) Neptune Systems LD-1 Low-Profile Leak Detection Probe