EMERSON
Emerson AMS Trex HART Communicator – TREXLFPKLWS3S
Emerson AMS Trex HART Communicator – TREXLFPKLWS3S
SKU:EME TREXLFPKLWS3S-TU
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Emerson Trex HART Communicator – Touchscreen Field Device Communicator
The Emerson Trex TREXLFPKLWS3S-TU is a rugged, touchscreen-based HART communicator built for efficient commissioning, configuration, and troubleshooting of field instruments. Supporting full HART protocol, the Emerson Trex enables real-time device diagnostics and simplifies maintenance in complex industrial environments.
Key Features & Benefits:
- Supports full HART protocol for complete device configuration
- Intuitive touchscreen interface for faster navigation and setup
- Built for field use – rugged and portable design
- Advanced diagnostics help reduce downtime and troubleshoot faster
- Ideal for commissioning, calibrating, and maintaining field instruments
- Compatible with Emerson AMS software for streamlined workflows
Specifications:
- Protocols: HART
- Certs: CSA, ATEX, IECEx
- Display: 5.7” color touchscreen
- OS: Windows Embedded
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["Instrumentation & Controls Test Equipment"]

Performs well, just needs a better strap
This thing’s a beast in the field—fast, accurate, and doesn’t crash. Only thing I’d change is the shoulder strap - it’s awkward when you're climbing or working tight spaces. Otherwise, 10/10 for performance.
Very good tool, but heavy
Functionality is excellent, connects fast and updates went fine. A bit heavier than I expected, especially when carrying other gear, but that’s the tradeoff for ruggedness I guess. Overall very happy with it.
Best communicator we’ve used to date
We upgraded from the old 475 and it’s night and day. TREX boots fast, battery lasts all day, and the touch screen’s actually useful in the field. HART and Foundation Fieldbus both work smooth. 100% would recommend.