Structured Manufacturing Data (2026)

Mass Flow Controller

Based on aggregated insights from structured factory profiles within the CNFX directory, the standard Mass Flow Controller used in the Machinery and Equipment Manufacturing sector typically supports operational capacities ranging from standard industrial configurations to heavy-duty production requirements.

Technical Definition & Core Assembly

A canonical Mass Flow Controller is characterized by the integration of Sensor Tube/Bypass and Thermal Sensor. In industrial production environments, manufacturers listed on CNFX commonly emphasize Stainless Steel (body & wetted parts) construction to support stable, high-cycle operation across diverse manufacturing scenarios.

A precision instrument that measures and controls the flow rate of gases in a carrier gas supply system.

Product Specifications

Technical details and manufacturing context for Mass Flow Controller

Definition
A critical component within the Carrier Gas Supply System that precisely measures and regulates the mass flow rate of carrier gases (such as nitrogen, helium, or argon) to analytical instruments or process chambers. It ensures consistent and accurate gas delivery, which is essential for maintaining process stability, repeatability, and analytical accuracy in various industrial and laboratory applications.
Working Principle
Typically operates on the thermal principle: a small portion of the gas flow is diverted through a sensor tube. The sensor measures the heat transfer (temperature difference) caused by the flowing gas, which is proportional to the mass flow rate. This measurement is compared to a setpoint, and an internal control valve is adjusted electronically to maintain the desired flow.
Common Materials
Stainless Steel (body & wetted parts), Silicon (sensor chip)
Technical Parameters
  • Full-scale flow range (e.g., 0-500 sccm), indicating the maximum controllable flow rate. (sccm) Per Request
Components / BOM
  • Sensor Tube/Bypass
    Diverts a small, known fraction of the main gas flow for thermal measurement.
    Material: Stainless steel or specialty glass
  • Thermal Sensor
    Measures the temperature difference caused by gas flow to determine mass flow rate.
    Material: Thin-film platinum or silicon
  • Control Valve
    Modulates the gas flow based on the sensor signal to match the setpoint.
    Material: Stainless steel, elastomer (seals)
  • Electronics/Controller
    Processes sensor signals, compares to setpoint, and drives the control valve.
    Material: Printed circuit board, electronic components

Industry Taxonomies & Aliases

Commonly used trade names and technical identifiers for Mass Flow Controller.

Applied To / Applications

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

Industrial Ecosystem & Supply Chain Structure

Complementary Systems
Downstream Applications
Specialized Tooling

Application Fit & Sizing Matrix

Operational Limits
accuracy: ±0.5% to ±1.5% of full scale (typical)
pressure: Up to 100 bar (typical), 150 bar (high-pressure models)
flow rate: 0-10 sccm to 0-500 slm (standard ranges), custom ranges available
temperature: -20°C to 70°C (operating), -40°C to 85°C (storage)
repeatability: ±0.1% to ±0.25% of reading
Media Compatibility
✓ Clean dry gases (N2, O2, Ar) ✓ Corrosive gases with wetted parts in Hastelloy C-276 ✓ Reactive gases with surface passivation (e.g., NF3, Cl2)
Unsuitable: Particulate-laden gases or slurries (causes sensor clogging and drift)
Sizing Data Required
  • Required flow range (minimum and maximum)
  • Process gas composition and purity
  • Operating pressure and temperature conditions

Reliability & Engineering Risk Analysis

Failure Mode & Root Cause
Sensor drift
Cause: Contamination of thermal sensor elements from process gases or particulates, leading to inaccurate flow readings.
Valve sticking or leakage
Cause: Wear of valve seat or seal due to particulate abrasion, chemical corrosion, or thermal cycling, causing flow control failure.
Maintenance Indicators
  • Audible hissing or irregular flow noise indicating valve leakage or obstruction.
  • Visual contamination or discoloration on sensor or valve assembly, suggesting process fluid ingress or degradation.
Engineering Tips
  • Implement regular calibration with certified standards to detect and correct sensor drift early.
  • Use high-purity filters upstream and ensure clean, dry instrument air/gas supply to prevent particulate and moisture damage.

Compliance & Manufacturing Standards

Reference Standards
ISO 5167-1:2022 Measurement of fluid flow by means of pressure differential devices ANSI/ISA-75.05.01-2000 Control Valve Sizing Equations DIN EN 60534-2-1 Industrial-process control valves - Flow capacity
Manufacturing Precision
  • Flow accuracy: +/-0.5% of full scale
  • Repeatability: +/-0.1% of full scale
Quality Inspection
  • Leak test at 150% of maximum operating pressure
  • Calibration verification against NIST-traceable standards

Factories Producing Mass Flow Controller

Manufacturer profiles with relevant production capability in China

Manufacturer listings support early research and capability understanding. They are not certification, ranking, or transaction guarantees.

Technical documentation
4/5
Manufacturing capability
4/5
Inspection readiness
5/5
Supplier transparency
3/5

These scores are example evaluation dimensions, not real customer ratings, country-specific buyer feedback, or live inquiry activity.

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Frequently Asked Questions

What materials are used in this mass flow controller's construction?

This mass flow controller features a stainless steel body and wetted parts for durability and corrosion resistance, along with a silicon sensor chip for precise gas flow measurement.

How does this mass flow controller maintain accuracy in gas flow measurement?

The controller uses a thermal sensor and bypass system to precisely measure gas flow rates, with electronic controls that continuously adjust the control valve to maintain your desired flow parameters.

What industrial applications is this mass flow controller suitable for?

This precision instrument is ideal for machinery and equipment manufacturing applications requiring controlled gas flow, including carrier gas systems, process control, and any application needing accurate gas delivery.

Can I contact factories directly on CNFX?

CNFX is an open directory, not a transaction platform. Each factory profile provides direct contact information and production details to help you initiate direct inquiries with Chinese suppliers.

Data Basis

CNFX manufacturer profiles, technical classification, publicly available product information, and ongoing plausibility checks.

Preliminary Technical Classification
This page supports structured research, RFQ preparation, and supplier evaluation. It does not replace buyer-led supplier qualification, standards review, or technical approval.

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