The Foxboro RH928AW is a high-performance gas analyzer module designed to deliver precise measurements of moisture and hydrocarbon content in industrial gas streams, making it a critical component in Foxboro’s portfolio of process analytical solutions. As part of the company’s trusted line of analytical instruments, this module plays a key role in ensuring process efficiency, product quality, and safety across various industrial applications.
What sets the Foxboro RH928AW apart is its ability to provide real-time, accurate data even in harsh operating conditions, where gas composition can vary significantly. By continuously monitoring moisture levels and hydrocarbon concentrations, the Foxboro RH928AW helps operators maintain optimal process parameters, prevent equipment corrosion, and ensure compliance with environmental regulations. Its seamless integration with distributed control systems (DCS) and programmable logic controllers (PLCs) makes it a versatile tool in complex automation setups, while its rugged design ensures reliable performance in demanding environments. Whether deployed in natural gas processing or petrochemical production, the Foxboro RH928AW delivers the data needed to make informed operational decisions.
The Foxboro RH928AW combines precision measurement with robust performance to meet the demands of industrial gas analysis. Its dual capability to measure both moisture and hydrocarbons eliminates the need for separate analyzers, simplifying system design and reducing installation costs. The module’s high accuracy—±1% for moisture and ±2% for hydrocarbons—ensures reliable data for critical process control, helping to minimize product waste and optimize energy usage.
A standout feature is its fast response time of less than 10 seconds, allowing operators to quickly adjust processes in response to changing gas composition. This agility is particularly valuable in applications like natural gas sweetening, where rapid shifts in moisture content can impact pipeline integrity. The Foxboro RH928AW also offers flexible connectivity via 4–20 mA analog outputs and Modbus RTU, enabling seamless integration with Foxboro’s I/A Series DCS and third-party control systems without the need for custom interfaces.
Built to withstand industrial rigors, the module operates reliably in temperatures ranging from -20°C to +50°C and handles sample gases up to 60°C, making it suitable for both indoor analyzer shelters and outdoor installations. Its low power consumption (max 15 W) reduces energy costs, while a self-diagnostic system provides real-time alerts for issues like sensor degradation or sample line blockages, simplifying maintenance and minimizing downtime.
The Foxboro RH928AW is widely used in industries where precise gas composition monitoring is essential. In natural gas processing plants, it monitors moisture levels in pipeline gas to prevent hydrate formation, which can block flow and damage equipment. By keeping moisture below 100 ppm, the Foxboro RH928AW ensures gas remains within pipeline specifications, avoiding costly dehydration system overruns.
In petrochemical refineries, the module analyzes hydrocarbon concentrations in process streams during cracking or distillation, ensuring product purity and optimizing catalyst usage. For example, in ethylene production, it tracks propane and butane levels to maintain reaction efficiency and reduce byproduct formation.
The Foxboro RH928AW also plays a key role in biogas facilities, where it measures moisture and methane content in renewable gas streams, ensuring compliance with injection standards for natural gas grids. In industrial gas production—such as nitrogen or oxygen generation—it monitors trace hydrocarbons to prevent contamination, protecting end-use applications in food packaging or medical settings.
Foxboro RH928BW – Variant of the Foxboro RH928AW optimized for high-moisture environments (up to 5000 ppm).
Foxboro 873PH – pH analyzer that complements the Foxboro RH928AW in integrated process monitoring systems.
Foxboro 970FT – Flow transmitter that pairs with the Foxboro RH928AW to calculate mass flow with corrected gas composition.
Foxboro IA Series 760 – DCS interface module that enables the Foxboro RH928AW to communicate with I/A Series systems.
Foxboro RH926A – Legacy moisture analyzer, predecessor to the Foxboro RH928AW with basic measurement capabilities.
Foxboro 2AI-A – Analog input module that receives signals from the Foxboro RH928AW in PLC-based control systems.
Foxboro RH928CW – Explosion-proof version of the Foxboro RH928AW for hazardous area installations (Zone 1/21).
Installation of the Foxboro RH928AW requires a panel or 19-inch rack with adequate space to accommodate its dimensions (150 mm × 250 mm × 300 mm). The module should be mounted in a location with ambient temperatures between -20°C and +50°C, protected from direct sunlight and excessive vibration. Proper sample gas conditioning is critical—install a filter and pressure regulator upstream to remove particulates and maintain stable pressure (typically 1–5 bar). Ensure the 24 V DC power supply is properly grounded to minimize electrical noise in measurement signals.
For maintenance, calibrate the
Foxboro RH928AW quarterly using certified gas standards to maintain accuracy. Inspect sample lines monthly for blockages or leaks, which can skew readings. Replace sensors every 12–18 months depending on usage, as sensor drift may occur over time in high-contamination environments. Use the module’s diagnostic outputs to monitor performance indicators, addressing alerts promptly to avoid unplanned downtime.
The Foxboro RH928AW is backed by a one-year warranty from Xiamen Xiongba E-commerce Co., Ltd., a global supplier of industrial automation parts with over a decade of expertise. This warranty covers manufacturing defects, with free replacement services provided for eligible issues within the coverage period. Xiamen Xiongba sources products directly from trusted overseas manufacturers, ensuring the Foxboro RH928AW meets strict quality and performance standards.
Customers benefit from the company’s global support network, offering technical assistance for installation, calibration, and troubleshooting. This commitment ensures users can rely on the Foxboro RH928AW to deliver accurate gas analysis data, backed by a partner dedicated to minimizing downtime and maximizing operational efficiency.
Xiamen Xiongba E-commerce Co., Ltd. specializes in the industrial automation sector, focusing on the sales of Distributed Control Systems (DCS), robot systems, and modules and spare parts for large-scale servo control systems. Its business covers a wide range of industrial automation products, including PLCs, MOTOROLA MVME industrial modules, Anybus communication converters, RTU remote modules, industrial PCs, low-frequency industrial displays, and SCSI human-machine interfaces. With over a decade of industry experience, Xiongba has grown into a global supplier of industrial automation spare parts. The company sources directly from overseas, offering products and parts from multiple countries and manufacturers, which helps solve customers' procurement challenges, ensures product quality, and provides a significant price advantage.
