Inline EC+Temp Sensor, Heavy Duty

What the PCT-2 Is

The TrolMaster PCT-2 is a heavy-duty inline EC and temperature probe purpose-built for the Aqua-X family of irrigation controllers (NFS-1, NFS-2, and NFS-3). The single-cylinder electrode design mounts into standard 3/4" PVC tee fittings in an active feed line, or can be submerged directly in a reservoir or nutrient tank — whichever placement fits your system layout. It connects to the Aqua-X via the AMP-2 sensor board on NFS-1 builds, or the AMP-3 board on NFS-2, NFS-3, Green-X (GCS-1), and Tent-X (TCS-1) systems.

The probe is commercially rated — not a hobbyist-grade resistive sensor — which means it's designed to hold calibration and withstand the daily wet-environment stresses of a production facility. The 3.6-meter (approximately 12-foot) cable provides enough reach to route cleanly from a tee in the main feed trunk back to the sensor board without extension hacks.

Who It's For

Any licensed cannabis or hemp operator running a TrolMaster Aqua-X irrigation control system who needs closed-loop visibility into EC and water temperature at the delivery point — not just at the reservoir. Inline placement means you're reading the solution as it actually moves through the line, which matters in larger facilities where long runs, pump heat, or temperature stratification between the tank and the canopy can create real variance.

It's also the right tool for operators building out a data-logging discipline: the Aqua-X controller logs sensor readings over time and surfaces them on the LCD and mobile app, so you have a historical record of EC trends across irrigation events — useful for crop-steering protocols that rely on tracking how nutrient concentration changes through the day or across a crop cycle. The PCT-2 feeds that data stream continuously.

Key Features

Single-cylinder commercially rated electrode probe — holds calibration under continuous wet-environment use. Installs inline in standard 3/4" PVC tee fittings or submerges directly in a tank, giving you flexibility depending on where in the system you need the measurement point. Mini DIN terminal connects directly to the AMP-2 or AMP-3 sensor board with no adapter needed. The 3.6-meter cable is long enough to reach from a main-line tee to a wall-mounted controller in most single-room builds.

Operating range is 32–122 °F with humidity tolerance up to 90% — appropriate for commercial indoor cultivation environments. Readings surface on the Aqua-X master controller's LCD display in near real time, keeping your monitoring loop tight. Compatible across the full Aqua-X line: NFS-1 (via AMP-2), NFS-2, NFS-3, Green-X GCS-1, and Tent-X TCS-1 (all via AMP-3).

How It Fits a Commercial Build

In a production environment where irrigation is automated through the Aqua-X platform, the PCT-2 closes the feedback loop on nutrient delivery. Controllers like the NFS-2 and NFS-3 can monitor multiple sensor inputs — pH, EC, temperature, water content — simultaneously, and trigger alerts or irrigation adjustments based on those readings. The PCT-2 is the component that puts real-time inline EC and temperature data into that loop.

Placement in the main feed trunk — upstream of zone splits — gives you a single representative read of the solution being delivered across the entire room. If your build uses multiple zones or separate rooms fed from the same reservoir, you can add additional PCT-2 units on each branch via the AMP-3's expanded sensor capacity on NFS-2 and NFS-3 systems. For operators building toward crop-steering automation, continuous inline EC data is a foundational input — the PCT-2 is where that data originates.