From welding and additive manufacturing to furnace atmospheres and inerting systems, argon plays a critical role in maintaining product quality and process stability.
Fox Thermal argon flow meters deliver precise, repeatable measurements across a wide range of flow conditions—helping you reduce gas waste, keep processes stable, and operate safely and efficiently.
Accurately measure low argon flow rates in shielding gas, purge lines, and back-purge applications where tight control is critical to prevent defects and contamination.
Direct mass flow measurement and high turndown capability help identify leaks, overuse, and inefficiencies—turning hidden losses into actionable data.
Rugged construction with hazardous area approvals delivers reliable performance in demanding environments such as furnaces, mixed gas skids, and manufacturing lines.
Measuring argon flow is essential for maintaining process quality, controlling costs, and ensuring safe operation across industrial environments. Because argon is an inert and relatively expensive gas, even small inefficiencies, such as leaks, excessive purge rates, or improper flow settings, can drive up operating costs over time.
Thermal mass flow meters are well-suited for measuring argon because they provide direct mass flow readings without requiring pressure or temperature compensation. This supports accurate measurement across both low-flow applications, such as purge lines and distribution systems.
As demand for efficiency and traceability continues to grow, manufacturers rely on flow measurement to better understand usage, reduce waste, and achieve consistent process conditions.
Help Me Choose A Flow Meter
Argon flow meters are used across a wide range of industries and processes, including:
Thermal mass flow meters from Fox Thermal measure gas mass flow directly, with no need for additional hardware and interface easily with existing systems. Fox Thermal products are designed for use in fuel gas and air feed lines found in process heating and utility operations thus giving the user maximum control in optimizing their process.
Follow the steps below to get started.
Fox Thermal’s Gas-SelectX® technology simplifies argon flow measurement by enabling users to select argon from a built-in gas library—without requiring factory recalibration. As process needs evolve, users can switch between argon and other gases or gas mixtures directly in the field.
This flexibility is especially useful for facilities using multiple shielding or process gases, allowing them to adapt quickly without added downtime or equipment changes.
Help Me Choose A Flow Meter
The Fox Thermal FT1 is a cost-effective gas flow meter that comes with both Gas-SelectX and CAL-V calibration validation. These allow the gas composition settings to be changed and then verified in the field, without returning the meter to the factory.
Features include:
The FT4A includes the Gas-SelectX expanded gas selection menu and CAL-V calibration validation. It is CE, FM, and FMc approved, along with ATEX and IECEx. Applications include gas measurement for argon and argon gas mix applications.
Features include:
The FT4X thermal mass flow meter measures gas flow rate/total and temperature. It comes with an advanced data logger which maintains a 7-year history. Includes the Gas-SelectX and the CAL-V calibration validation features.
Features include:
If you're not sure which meter is right for your application, our Help Me Choose app walks you through a short series of questions to help you choose the ideal meter.
Next, enter your process data and flow meter requirements into our automated product configurator. Drop-down menus and Help icons will guide you to answer each question.
Save the data you entered into the configurator to create a PDF with a model code and AppID. When you're ready, submit your application to Fox Thermal for a quote.
The FT1 is typically the best fit for most argon gas flow measurement applications due to its simplicity, cost-effectiveness, and built-in argon selection. FT4A and FT4X are strong alternatives when additional features like data logging or expanded gas menus are required.
Accurate argon flow measurement ensures proper shielding, prevents contamination, and maintains consistent process conditions. It also helps reduce gas waste and improve overall operational efficiency.
Yes. Fox Thermal flow meters are designed with excellent low-flow sensitivity, making them ideal for applications like purge lines, back-purge welding, and leak detection.
Yes. Models like the FT1, FT4A, and FT4X are available with FM, ATEX, and IECEx approvals and feature rugged NEMA 4X/IP66/67 enclosures for use in harsh and hazardous locations.
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