AITOLY MFM610 Thermal Mass Gas Flow Meter

Overview

The AITOLY MFM610 is a thermal mass gas flow meter engineered for high-reliability, zero-maintenance measurement of mass flow rate in clean, dry process gases. Unlike differential pressure or turbine-based instruments, the MFM610 employs constant-temperature anemometry (CTA), where two platinum resistance temperature detectors (RTDs) — one heated and one unheated — are placed in the gas stream. The heat transfer differential between them is directly proportional to the mass flow rate, enabling true mass flow measurement independent of temperature and pressure fluctuations. This principle eliminates the need for external compensation and ensures stable operation across varying ambient conditions. Designed for integration into OEM systems and industrial process lines, the MFM610 delivers traceable, repeatable measurements without moving parts — a critical advantage for applications demanding long-term stability and minimal downtime.

Key Features

• No moving parts: Eliminates mechanical wear, drift, and recalibration requirements over time.
• Multi-gas capability: Factory-calibrated for 13 common industrial and laboratory gases with user-selectable gas type via communication interface.
• Dual power architecture: Accepts 12–40 VDC input with built-in redundancy support, suitable for both 24 VDC control systems and wide-range industrial power supplies.
• Simultaneous real-time and totalized flow output: Measures instantaneous mass flow (sccm) and cumulative volume (mL or L) with non-volatile memory retention.
• Programmable alarm output: One isolated, solid-state relay output configurable for high/low flow thresholds with adjustable hysteresis and response delay.
• Integrated local display: Backlit LCD shows flow rate, totalized volume, gas selection, and status indicators without external instrumentation.
• Standard digital interfaces: Native support for RS232, RS485 (Modbus RTU), and CAN 2.0B protocols enables seamless integration with PLCs, SCADA systems, and data acquisition hardware.

Sample Compatibility & Compliance

The MFM610 is validated for use with non-corrosive, particle-free gases including air, nitrogen, oxygen, helium, argon, hydrogen, carbon dioxide, methane, ammonia, nitrous oxide, nitrogen dioxide, carbon monoxide, and nitric oxide. It is not rated for use with vapors, aerosols, condensable gases, or highly reactive or corrosive media (e.g., Cl₂, HCl, HF, or wet SO₂). The sensor body is constructed from 316 stainless steel with EPDM or Viton® sealing options (user-specified), ensuring compatibility with standard industrial gas handling practices. While not certified to IECEx or ATEX for hazardous areas, the device complies with CE electromagnetic compatibility (EMC) Directive 2014/30/EU and Low Voltage Directive 2014/35/EU. Its design supports adherence to ISO 5167-derived installation guidelines and aligns with quality system requirements for GLP-compliant laboratories when used with documented calibration records.

Software & Data Management

The MFM610 ships with free Windows-compatible configuration software supporting full parameter setup, gas selection, alarm threshold definition, unit conversion (sccm, slm, g/min), and real-time data logging at up to 10 Hz. The software includes export functionality to CSV and Excel formats, timestamped event logging (including alarm triggers and configuration changes), and firmware update capability. All communication transactions are logged locally on the host PC, satisfying basic audit trail requirements for internal QA/QC procedures. For regulated environments, the device can be configured to operate in “read-only” mode during routine operation, while configuration changes require authenticated access — a foundational step toward alignment with FDA 21 CFR Part 11 principles when implemented within a validated IT infrastructure.

Applications

The MFM610 serves as a precision flow sensing solution across multiple industrial and research domains. In semiconductor manufacturing, it monitors purge gas flows in chamber cleaning and deposition processes. In analytical chemistry labs, it controls carrier and auxiliary gas delivery for GC and GC-MS systems. Within energy R&D, it quantifies hydrogen and syngas flow in fuel cell test benches and electrolyzer characterization rigs. Process engineers deploy it for burner control in industrial furnaces, leak testing in pressure decay systems, and feedstock monitoring in catalytic reactors. Its compact form factor and low-pressure drop (<100 Pa at 1000 sccm) make it ideal for integration into portable gas analyzers, environmental emission monitors, and medical gas delivery modules requiring regulatory-grade repeatability.

FAQ

Does the MFM610 require periodic recalibration?
While thermal mass flow meters exhibit excellent long-term stability, AITOLY recommends annual verification against a NIST-traceable standard under application-specific gas and flow conditions to maintain metrological confidence.
Can the MFM610 measure humidified or mixed gases?
It is designed for dry, single-component gases. Humidity or gas mixtures outside its calibrated list require custom calibration and are not covered under warranty.
Is the alarm output electrically isolated?
Yes — the programmable relay output provides galvanic isolation rated to 1500 VAC, suitable for interfacing with safety-rated controllers.
What is the warm-up time to specified accuracy?
Less than 15 seconds after power-on, with full specification performance achieved within 60 seconds under stable thermal conditions.
Does the device support Modbus TCP?
No — only Modbus RTU over RS485 is supported. Ethernet or wireless connectivity requires an external protocol converter.