Sensor Board to connect sensors to NFS-2 controller with LCD display

What the AMP-3 Does

The AMP-3 is the sensor-to-controller bridge in TrolMaster's Aqua-X Pro ecosystem. It accepts a pH probe via BNC terminal and an EC/temperature probe via Mini DIN terminal, then communicates all three readings to the NFS-2 Aqua-X Pro master controller over a standard RJ12 cable via the controller's System terminal. Once live, pH level, EC/PPM, and water temperature are displayed simultaneously on the AMP-3's onboard LCD screen and on the NFS-2 master controller screen — giving you a local readout at the reservoir and a central readout at the panel.

This dual-display architecture matters in larger facilities where reservoirs or dosing systems are spread across the floor. Staff can verify readings at the tank without walking back to the controller, and the cultivation manager can see all zone data from the NFS-2 interface or remotely via the TrolMaster TM+ app.

Who It's For

Any licensed cannabis or hemp operator running the TrolMaster Aqua-X Pro (NFS-2) irrigation platform who needs per-reservoir water quality data. If you're running a single-reservoir small build, one AMP-3 (often bundled with the NFS-2) covers you. If you're operating a scaled commercial facility with multiple stock tanks, Dosatron inline dosing systems, or separate feed recipes by zone, the AMP-3's scalability to 50 boards per NFS-2 handles it.

The AMP-3 is compatible with the TrolMaster EC/Temp Sensor (PPH-1, PPH-2, PPH-3) and TrolMaster pH Sensor (PCT-1, PCT-2, PCT-3). It is not a standalone device — it requires an NFS-2 Aqua-X Pro or Aqua-X Plus controller as the host. If you're speccing a new Aqua-X Pro build from the ground up, plan one AMP-3 per monitored reservoir or dosing point.

Key Features and Installation

The AMP-3 was redesigned from the prior AMP-2 to use a standard RJ12 cable in place of a specialized DIN connection, which significantly simplifies cable sourcing and field installation. The board includes an addressing key that allows each unit to be uniquely identified by the NFS-2, enabling the controller to differentiate readings across all connected boards in a multi-tank setup.

Installation is plug-and-play. The package includes one sensor board, a 16 ft RJ12 cable, a 4 ft RJ12 cable, and a T-shaped splitter for daisy-chain or branched wiring runs. Boards can be daisy-chained or connected through a TrolMaster SPH-1 8-port hub to keep wiring organized. There is no practical limit on cable run distance between the AMP-3 and the NFS-2 host controller, giving installers flexibility in where sensors are physically mounted relative to the panel.

How It Fits a Commercial Build

In a commercial cultivation build, the NFS-2 is the irrigation brain — controlling up to 300 pumps and 300 solenoids, scheduling unlimited daily irrigation events per zone, and triggering feed-on-demand or feed-by-volume events based on sensor feedback. The AMP-3 is what gives that brain real-time, per-tank visibility into nutrient solution quality. Without it, you're flying blind on pH and EC at each point in the feed chain.

For operators running tiered irrigation (separate veg, early flower, late flower feed tanks), a separate AMP-3 per tank lets the NFS-2 track each reservoir's chemistry independently. Mobile notifications through the TrolMaster TM+ app fire when any sensor board reports an out-of-range reading, so floor staff aren't required to catch pH drift manually. If you're speccing the full Aqua-X Pro system — NFS-2 controller, AMP-3 boards, WCS-2 substrate sensors, and a DFW-1 flow meter — HSC can quote the complete package.