Trace Moisture Measurement with
Modbus Digital Communication
Enhance connectivity, simplify integration and achieve dependable data accuracy with trace moisture measurement solutions featuring Modbus digital communication.
Modbus
Modbus is one of the most widely adopted industrial communication protocols, designed to enable seamless data exchange between multiple instruments and a central controller, such as a programmable logic controller (PLC). It supports two‑way communication, allowing field devices to share measurement data with the controller when polled, and the controller to issue commands back to them, creating a unified network for control and monitoring.
For example, in a trace moisture monitoring system, the sensors function as Modbus servers, making their data available, while the supervisory computer or PLC operates as the Modbus client, polling the sensors to retrieve the latest readings. This straightforward architecture supports up to 247 devices on a single network, each with its own unique address, making Modbus scalable, flexible and easy to integrate into existing automation environments.
AMT Modbus RTU – now available
The AMT dewpoint transmitter is now available with Modbus RTU communication over Serial Line RS485, providing reliable data exchange even in areas with high electrical interference. This advanced connectivity enables robust digital communication for trace moisture measurement across a range of industrial applications.
Every AMT Modbus RTU transmitter can store a unique TAG ID, allowing effortless device identification and simple integration into larger process networks. This functionality supports enhanced diagnostics, quicker fault detection, and more efficient maintenance and monitoring.
Output units are factory configurable to your preferred scale: °C or °F dewpoint, ppm(v), ppb(v), g/m³ or lb/MMSCF, so your transmitter delivers precise, real‑time measurement data directly to your PLC or SCADA system. Access to key service information, such as calibration date, sensor range, and software version, helps improve visibility and supports planned maintenance activities.
For larger systems, multiple AMT transmitters can be daisy‑chained on a single EIA‑485 bus, minimising wiring and installation time. Each transmitter arrives ready for immediate commissioning, complete with a Certificate of Calibration traceable to National and International Humidity Standards, a detailed instruction manual, and a two‑metre cable.
Why Choose Modbus?
Modbus is an open protocol, meaning manufacturers can integrate it freely without licensing costs or royalties. This openness has made it one of the most trusted and enduring communication standards in the industry. It supports easy integration of new devices into existing systems, offering outstanding scalability and cross‑compatibility across a wide range of industrial platforms.
In addition to receiving measurement data, Modbus can also send control commands to field devices, enabling both monitoring and control within the same network. This bidirectional capability makes it ideal for today’s connected industrial environments where efficiency, reliability and responsiveness are key, especially in applications demanding precise, real‑time process optimisation.
To meet diverse communication and infrastructure needs, several Modbus variants are available:
In addition to receiving measurement data, Modbus can also send control commands to field devices, enabling both monitoring and control within the same network. This bidirectional capability makes it ideal for today’s connected industrial environments where efficiency, reliability and responsiveness are key, especially in applications demanding precise, real‑time process optimisation.
To meet diverse communication and infrastructure needs, several Modbus variants are available:
Together, these versions ensure Modbus remains a versatile and future‑ready solution for industrial communication, supporting applications from simple sensor networks to advanced plant‑wide automation systems. With consistent vendor adoption, strong interoperability, Modbus continues to deliver reliable connectivity, long‑term scalability, and seamless integration across modern industrial measurement and control environments.
