Aitoly MFC300 Compact Thermal Mass Flow Controller

Overview

The Aitoly MFC300 Compact Thermal Mass Flow Controller is an engineered solution for precise, real-time measurement and control of gas mass flow in laboratory, analytical, and industrial process environments. Based on constant-temperature anemometry (CTA) principles, the MFC300 employs a micro-electromechanical systems (MEMS) thermal sensor element to directly measure mass flow rate—eliminating dependence on gas density variations caused by temperature or pressure fluctuations. Unlike volumetric flowmeters, this thermal mass-based architecture provides inherent compensation for ambient and process condition shifts, delivering high reproducibility across diverse gas compositions (N₂, O₂, Ar, CO₂, He, air, and custom gas mixes with calibration). Its compact monolithic design integrates sensing, signal conditioning, PID control logic, and communication interfaces into a single housing, enabling deployment in space-constrained subsystems such as gas chromatography carriers, bioreactor feed loops, environmental emission monitors, and laser gas delivery modules.

Key Features

• Ultra-Fast Dynamic Response: 5 ms measurement response time and 300 ms closed-loop control settling time support rapid process transients and pulsed gas delivery protocols.
• MEMS-Based Sensing Core: Silicon-micromachined thermal sensor with integrated heater and dual temperature-sensing elements ensures long-term stability, low drift (<0.2% FS/year), and immunity to mechanical shock.
• No Warm-Up Required: Instant-on operation eliminates system startup delays—critical for intermittent-use applications like automated test benches or portable analyzers.
• Wide Turndown Ratio: Achieves reliable measurement and control over a 100:1 flow range (e.g., 0–10 sccm up to 0–1000 sccm depending on configuration), reducing the need for multiple full-scale devices.
• Low Pressure Drop Design: Optimized flow path geometry maintains pressure loss below 0.15 psi at maximum rated flow—minimizing impact on upstream pressure-sensitive components.
• Flexible Mounting Options: Supports direct tube mounting (¼″ NPT or M5/M6 compression fittings), panel mounting via flange kit, or PCB-level integration using surface-mount header pins.

Sample Compatibility & Compliance

The MFC300 is calibrated for common industrial and research gases including nitrogen, oxygen, argon, carbon dioxide, helium, synthetic air, and custom binary/mixed gases (calibration certificates available per ISO/IEC 17025-accredited procedures). Gas compatibility extends to non-corrosive, non-condensing, particle-free streams with dew point ≤ −20 °C and particulate content < 1 µm. The device meets CE marking requirements for electromagnetic compatibility (EN 61326-1) and safety (EN 61010-1). While not intrinsically safe certified, it complies with general-purpose laboratory equipment standards under IEC 61000-6-2/-6-3. For regulated environments, firmware supports audit-trail logging and user-access level configuration (admin/operator modes), aligning with GLP and basic GMP documentation practices.

Software & Data Management

Aitoly provides the MFC300 Configuration Suite—a Windows-based utility supporting bidirectional communication via RS485 (Modbus RTU protocol) or USB-to-serial adapter. Users can perform zero calibration, setpoint ramping, PID parameter tuning, alarm thresholds (flow high/low, sensor fault), and firmware updates. All configuration changes are timestamped and logged locally; optional CSV export enables traceability for QA/QC review. The device supports standard analog outputs (0–5 VDC or 4–20 mA) compatible with PLCs, DAQ systems, and SCADA platforms. For OEM integration, Aitoly supplies C/C++ and Python SDKs with full register mapping and error-handling examples.

Applications

• Gas flow control in benchtop GC carrier gas modules and detector make-up gas lines
• Precise reagent gas dosing in semiconductor process tools and thin-film deposition chambers
• Cell culture bioreactor inlet/outlet gas blending (O₂, CO₂, N₂) with cascade control capability
• Emission monitoring systems requiring stable, low-drift reference flow paths for dilution calibrators
• Laser cutting/welding assist gas regulation where dynamic responsiveness affects cut quality
• R&D instrumentation development—including portable breath analyzers, environmental sensor nodes, and microfluidic gas handling subsystems

FAQ

Is the MFC300 suitable for corrosive gases such as HCl or Cl₂?
No. The wetted materials consist of stainless steel 316L, glass, silicon, and epoxy—designed for inert and mildly reactive gases only. Corrosive, condensable, or particulate-laden gases require specialized variants with Hastelloy or PFA-wetted paths.
Can the MFC300 be recalibrated in-house?
Zero calibration is supported via software command; span calibration requires traceable gas standard and flow bench per ISO 6976 or ASTM D5291—recommended annually or after physical shock exposure.
Does the device support digital bus protocols beyond Modbus RTU?
Currently, RS485/Modbus RTU and analog outputs are standard. CANopen and EtherCAT interfaces are available under OEM agreement with minimum order volume.
What is the operating temperature range for continuous use?
Ambient operating range: 5–45 °C; compensated flow accuracy maintained from 10–40 °C. Extended-range versions (−10 to 50 °C) are available upon request.
How is traceability ensured for regulatory submissions?
Each unit ships with a factory calibration certificate referencing NIST-traceable standards. Optional 17025-accredited calibration with uncertainty budget is available at time of order.