Mass Flow Controller (MFC) for Gas Control

Product Specifications

Technical details and manufacturing context for Mass Flow Controller (MFC)

Definition

A Mass Flow Controller (MFC) is a component used in gas control systems to measure and regulate the mass flow rate of gases. It ensures accurate gas delivery for industrial processes by maintaining a setpoint flow, even under varying downstream conditions. The device typically operates on thermal measurement principles: a heated sensor is cooled by the gas flow, and the temperature change is proportional to the mass flow rate. A control valve adjusts the flow based on feedback from the sensor to maintain the desired setpoint.

This MFC is designed for chemical manufacturing applications and is constructed with stainless steel wetted materials (316L per ASTM A240) as standard, with optional Hastelloy C-22 for enhanced corrosion resistance. It offers a flow range of 0–50 L/min (other ranges available on request), accuracy of ±1.0% of full scale (including linearity and repeatability), and repeatability of ±0.2% of full scale. Response time is 1–2 seconds to reach 90% of setpoint. Operating temperature is -10 to 50 °C for electronics, with a wider sensor range possible. Operating pressure is 1.0–1.6 MPa. Supply voltage is 24 V DC ±10% with reverse polarity protection, and power consumption is ≤4 W at nominal voltage. Output signal is 4–20 mA analog, with RS485 optional. Ingress protection is IP54–IP65 depending on connector option (per IEC 60529). Weight ranges from 1.2–1.8 kg depending on fittings and electronics.

All listed parameters are reference ranges and must be verified for the specific model and application with the legal manufacturer or supplier. Standards mentioned are for procurement and verification reference only, not proof of certification or compliance.

Working Principle

The MFC operates on thermal mass flow measurement. A sensor consists of a heated element and temperature sensors. Gas flowing through the device cools the heated element; the temperature difference between the sensors is proportional to the mass flow rate. This signal is processed by electronics, which compare it to the user-set setpoint. If deviation occurs, the control valve adjusts its opening to increase or decrease flow, using a closed-loop feedback mechanism. The valve is typically a solenoid or piezoelectric type, and the response time is optimized for stable control. The device requires a stable power supply and proper grounding to ensure accurate operation.

Common Materials

Stainless Steel

Technical Parameters

Parameter	Typical range	Notes & selection driver
Flow Range	0–50 L/min	Standard range; other ranges available on request.
Accuracy	±1.0 % of full scale	Includes linearity and repeatability.
Repeatability	±0.2 % of full scale	Under constant conditions.
Response Time	1–2 s	Time to reach 90% of setpoint.
Operating Temperature	-10–50 °C	For electronics; sensor may have wider range.
Supply Voltage	24 ±10% V DC	Reverse polarity protected.
Power Consumption	≤4 W	At nominal supply voltage.
Output Signal	4–20 mA	Analog; RS485 optional.
Ingress Protection	IP54–IP65	Depending on connector option.IEC 60529
Wetted Materials	316L	Optional Hastelloy C-22.ASTM A240
Weight	1.2–1.8 kg	Depends on fittings and electronics.

Ranges are indicative industry figures for RFQ preparation, not a supplier commitment. Confirm every value and standard with the legal manufacturer before ordering.

Components / BOM

Flow Sensor
Measures the actual gas flow rate using thermal or other measurement principles

Material: Stainless Steel
Control Valve
Adjusts gas flow based on sensor feedback to maintain setpoint

Material: Stainless Steel
Electronics Unit
Processes sensor data and controls valve position

Material: Electronic Components

Applied To / Applications

This component is essential for the following industrial systems and equipment:

Gas Control System

View system integration details

Manufacturers of Mass Flow Controller (MFC)

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Frequently Asked Questions

What is the flow range of this MFC?

The standard flow range is 0–50 L/min, but other ranges are available on request. Always confirm the exact range for your specific model with the manufacturer.

What is the accuracy and repeatability?

Accuracy is ±1.0% of full scale (including linearity and repeatability), and repeatability is ±0.2% of full scale. These are reference values; verify for your model.

What are the operating pressure and temperature limits?

Operating pressure is 1.0–1.6 MPa. Operating temperature for electronics is -10 to 50 °C, but the sensor may have a wider range. Confirm with the supplier.

What output signals are available?

The standard output is 4–20 mA analog, with RS485 as an option. Check the connector and communication protocol with the manufacturer for your application.

Data Basis

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Preliminary Technical Classification

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accuracy:	±0.5% to ±1.5% of full scale (typical)
pressure:	Up to 1000 psig (69 bar) standard, up to 3000 psig (207 bar) high-pressure models
flow rate:	0-5 sccm to 0-500 slpm (standard range), custom ranges available
temperature:	-10°C to +50°C
repeatability:	±0.2% of full scale (typical)

Mass Flow Controller (MFC)

Product Specifications

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