AITOLY MFC330 Thermal Mass Flow Controller

Overview

The AITOLY MFC330 is a precision thermal mass flow controller engineered for stable, repeatable gas flow regulation in demanding laboratory and industrial environments. Based on the principle of constant-temperature anemometry (CTA), the device measures mass flow rate by detecting the heat transfer between a heated sensor element and the flowing gas stream—eliminating dependence on gas pressure or temperature fluctuations. Its core architecture integrates a capillary-tube-based thermal sensor, a precision bypass分流 system, and a high-resolution proportional control valve, all governed by a digitally tuned PID algorithm. This closed-loop design ensures dynamic compensation for upstream/downstream pressure variations and ambient temperature drift, delivering consistent setpoint tracking across variable operating conditions. Unlike volumetric flow devices, the MFC330 reports true mass flow in standardized cubic centimeters per minute (sccm) or standard liters per minute (slpm), referenced to ISO 2533 (0 °C, 101.325 kPa, dry gas), making it suitable for stoichiometric gas delivery, process calibration, and trace-level gas dosing.

Key Features

• Capillary-tube thermal sensing element with low thermal inertia and high signal-to-noise ratio for rapid response and minimal zero drift
• Integrated bypass分流 architecture enabling wide turndown ratio (1:200 measurement, 1:100 control) without mechanical range switching
• Normally-closed stainless steel proportional valve with sub-second actuation and <3 s full-scale step response time
• Digital PID controller with auto-tuning capability and configurable ramp rates for smooth flow transitions
• Pre-heated thermal stabilization circuit achieving T95 warm-up in ≤5 minutes; optimal long-term stability reached after 30 minutes
• Gas-specific calibration support for over 98 commonly used gases—including N₂, O₂, Ar, He, CO₂, CH₄, H₂, NH₃, and synthetic air—traceable to NIST-certified standards
• RS485 Modbus RTU and analog 0–5 V / 4–20 mA interfaces for seamless integration into PLC-based automation systems and SCADA platforms

Sample Compatibility & Compliance

The MFC330 is designed exclusively for clean, dry, non-corrosive, and non-particulate gases. It is incompatible with condensable vapors, aggressive halogenated compounds, or gases containing oil mist or particulates >0.1 µm. All wetted parts are constructed from 316L stainless steel and fused silica capillaries, ensuring compatibility with ultra-high-purity (UHP) gas lines. The device complies with CE marking requirements under the EU Electromagnetic Compatibility Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. While not certified for hazardous area use (e.g., ATEX or IECEx), its intrinsic safety profile supports installation in Class 1, Division 2 environments when installed per NEC Article 500 guidelines. Calibration documentation includes uncertainty budgets per ISO/IEC 17025:2017, and firmware supports audit trails required for GLP/GMP-aligned workflows.

Software & Data Management

The MFC330 operates as a standalone instrument but supports host-level configuration and real-time monitoring via AITOLY’s PC-based FlowControl Studio software (Windows 10/11, 64-bit). The application enables multi-channel synchronization, batch calibration file import/export (CSV/Excel), and time-stamped data logging at up to 10 Hz resolution. All parameter changes—including setpoint updates, gas selection, and PID gain adjustments—are recorded with user ID, timestamp, and pre/post values, satisfying FDA 21 CFR Part 11 requirements for electronic records and signatures when deployed with validated system configurations. Firmware updates are delivered via signed binary packages with SHA-256 verification, and device identity is secured through embedded serial number and MAC address binding.

Applications

• Gas flow regulation in semiconductor process tools (e.g., CVD, PECVD, etch chamber purge sequences)
• Carrier and reactant gas delivery in GC, GC-MS, and ICP-MS analytical systems
• Controlled atmosphere generation for environmental simulation chambers and accelerated aging tests
• Precise gas blending in fuel cell R&D, battery testing, and catalytic reaction studies
• Calibration reference for secondary flow meters in metrology labs accredited to ISO/IEC 17025
• Cell culture bioreactor gas supply (O₂, CO₂, air) where dose accuracy directly impacts viability and metabolite yield

FAQ

What gases can the MFC330 measure and control?
It supports over 98 pre-calibrated gases—including inert, reactive, and light gases—provided they are clean, dry, and non-corrosive. Custom calibrations are available upon request for specialized gas mixtures.

Is the MFC330 compatible with vacuum or negative-pressure applications?
No. It is rated for operation within 0.1–1.2 bar(a) inlet pressure and requires positive differential pressure across the valve. Use only in downstream-controlled (pressure-regulated) configurations.

How does the device handle gas property changes during operation?
Each gas selection triggers internal density and specific heat corrections derived from NIST REFPROP v10 databases. Switching gases requires manual reselection via interface or command protocol to maintain accuracy.

Can multiple MFC330 units be synchronized for ratio control?
Yes. Using Modbus RTU daisy-chaining and master-slave timing alignment, up to 32 units can achieve coordinated ramp profiles and interlocked fault responses.

Does the MFC330 include factory calibration certificates?
All units ship with a traceable calibration report (ISO/IEC 17025-compliant) listing as-found/as-left data, uncertainty values, and environmental test conditions.