AITOLY MFC330 Thermal Mass Flow Controller

Overview

The AITOLY MFC330 Thermal Mass Flow Controller is an engineered solution for precise, real-time gas flow measurement and closed-loop control in laboratory, pilot-scale, and industrial process environments. Based on the principle of thermal dispersion—where heat transfer from a heated sensor element to the flowing gas is directly correlated to mass flow rate—the MFC330 delivers true mass flow output independent of pressure and temperature fluctuations. Unlike volumetric devices, it requires no external temperature or pressure compensation, making it ideal for applications demanding consistent stoichiometric ratios, repeatable gas dosing, or dynamic process tuning. Its integrated architecture combines a capillary-tube thermal sensor, precision bypass分流 path, high-bandwidth proportional control valve, and embedded PID regulation logic—enabling stable setpoint tracking even under variable inlet pressure (up to 1 MPa differential) or ambient temperature shifts (−20 to +65 °C).

Key Features

• Thermal dispersion sensing technology with built-in temperature compensation for accurate mass flow measurement across diverse gases (N₂, O₂, Ar, He, CO₂, H₂, NH₃, and other clean, dry gases with ≥98% purity)
• Wide controllable range of 1–100% full scale (1:100 turndown) and measurable range down to 0.5% FS (1:200), supporting both low-flow micro-dosing and higher-capacity process streams
• Fast dynamic response: <3 seconds typical time-to-setpoint, optimized for feedback-controlled systems such as CVD reactors, plasma etch chambers, or gas chromatography carrier gas regulation
• Robust mechanical design with 304/316 stainless steel wetted parts and FKM (Viton®-equivalent) seals, rated for continuous operation at up to 3 MPa (30 bar) system pressure
• Flexible electrical interface options including analog voltage (0–5 V / 0–10 V) and current (4–20 mA) outputs, plus RS485 Modbus RTU for integration into SCADA, PLC, or LabVIEW-based automation platforms
• Horizontal-only mounting configuration with M4 × 5 mm calibration alignment holes, ensuring mechanical stability and minimizing gravitational influence on sensor performance

Sample Compatibility & Compliance

The MFC330 is validated for use with non-corrosive, particle-free, and moisture-free gases. It is not suitable for liquids, vapors, or aggressive media such as Cl₂, HF, or HBr without custom material upgrades. Gas compatibility extends to standard industrial and research-grade gases meeting ISO 8573-1 Class 4 purity (≤0.1 µm particles, dew point ≤−20 °C). While not certified to IEC 61508 or SIL standards out-of-the-box, its deterministic control loop, fail-safe normally-closed valve actuation, and traceable factory calibration support integration into GMP-compliant processes where instrument qualification (IQ/OQ/PQ) is performed per internal SOPs. Calibration certificates are provided with NIST-traceable reference standards.

Software & Data Management

The MFC330 operates autonomously without proprietary software but supports bidirectional communication via Modbus RTU over RS485 for remote configuration, real-time data logging, and multi-unit synchronization. When deployed in regulated environments (e.g., pharmaceutical gas delivery systems), users may implement audit-trail-enabled SCADA systems compliant with FDA 21 CFR Part 11 requirements. The device retains no internal storage; all operational parameters—including setpoints, actual flow values, valve position, and error flags—are accessible in real time via register mapping. Firmware updates are performed externally using industry-standard Modbus write commands, ensuring full version control and change management traceability.

Applications

• Gas supply regulation in semiconductor fabrication tools (e.g., ALD, PECVD, sputtering)
• Precise reagent dosing in catalytic reaction studies and microreactor systems
• Carrier and makeup gas control in analytical instrumentation (GC, GC-MS, ICP-MS)
• Environmental simulation chambers requiring stable gas mixture ratios (e.g., O₂/N₂ blends for corrosion testing)
• Calibration transfer standards for secondary flow meters in metrology labs
• Lab-scale fuel cell and battery testing setups with hydrogen, oxygen, or air feed control

FAQ

Is the MFC330 suitable for corrosive or humid gas streams?
No. It is designed exclusively for clean, dry, non-aggressive gases. Moisture or particulates will degrade sensor accuracy and compromise seal integrity. Optional FFKM seals and Hastelloy-C wetted parts are available upon request for specialized applications.

Does the device require periodic recalibration?
Yes. Annual recalibration is recommended for applications requiring traceable measurement uncertainty. Factory recalibration includes full-range verification against gravimetric or laminar flow element standards per ISO/IEC 17025 procedures.

Can multiple MFC330 units be synchronized for ratio control?
Yes. Using Modbus RTU addressing and master-slave timing coordination, up to 32 units can be daisy-chained on a single RS485 bus for coordinated multi-gas blending or cascade control loops.

What is the impact of orientation on performance?
The MFC330 must be installed horizontally, as specified. Vertical or inverted mounting alters thermal convection patterns around the sensor tube and introduces systematic bias exceeding ±0.5% FS.

Is firmware upgrade support available post-purchase?
Yes. AITOLY provides firmware revision notes and update packages to registered end-users, with version history documented per ISO 9001 change control protocols.