Editorial Technical Reference

Mass Flow Controller

This page explains how Mass Flow Controller is classified within Machinery and Equipment Manufacturing. Technical values and manufacturer relationships are research references; confirm the current specification and supplier evidence for each order.

Technical Definition & Core Assembly

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

Representative product image. Confirm appearance and specifications with the manufacturer.

Product Specifications

Technical details and manufacturing context for Mass Flow Controller

Definition
This mass flow controller is a component designed for use in carrier gas supply systems, where it precisely measures and regulates the mass flow rate of gases such as nitrogen, helium, or argon. It is intended for integration into analytical instruments or process chambers, ensuring consistent and accurate gas delivery. This stability is critical for maintaining process stability, repeatability, and analytical accuracy in industrial and laboratory applications. The device operates on the thermal principle: a small portion of the gas flow is diverted through a sensor tube, where the sensor measures heat transfer 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. The body and wetted parts are made of stainless steel, with a silicon sensor chip. Key parameters include a flow rate range of 0–100 SLM, accuracy of ±1.0% FS, repeatability of ±0.2% FS, response time of 1–2 seconds, operating temperature of -10 to 50 °C, supply voltage of 24 V DC ±10%, power consumption ≤4 W, analog output and input signals of 0–5 V DC, leak rate ≤1×10⁻⁹ Pa·m³/s, ingress protection IP40 (per IEC 60529), wetted materials 316L stainless steel (optional Hastelloy), and weight of 1.5–2.0 kg. These values are reference ranges and must be verified for the specific model and application. Always confirm model-specific values and standards with the legal manufacturer or supplier before procurement or use.
Working Principle
The mass flow controller 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. The device requires a stable power supply and proper installation to ensure accurate operation.
Common Materials
Stainless Steel (body & wetted parts), Silicon (sensor chip)
Technical Parameters
ParameterTypical rangeNotes & selection driver
Flow Rate Range0–100 SLMStandard range; other ranges available on request
Accuracy±1.0 % FSFull scale accuracy at calibration conditions
Repeatability±0.2 % FSUnder constant conditions
Response Time1–2 sTo within 2% of setpoint
Operating Temperature-10–50 °CFor electronics; sensor may have wider range
Supply Voltage24 ±10% V DCReverse polarity protected
Power Consumption≤4 WAt nominal supply voltage
Analog Output Signal0–5 V DCLinear with flow rate
Analog Input Signal0–5 V DCSetpoint control signal
Leak Rate≤1×10⁻⁹ Pa·m³/sHelium leak test
Ingress ProtectionIP40Indoor use onlyIEC 60529
Wetted Materials316LStainless steel; optional HastelloyASTM A276
Weight1.5–2.0 kgDepending on fittings

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
  • 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

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.

Indicative industry ranges for design and RFQ preparation. Confirm the exact figures and applicable standard with the manufacturer before specifying.

Compliance & Manufacturing Standards

Applicable 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

Quoted from the published standard.

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

Manufacturers of Mass Flow Controller

1 company lists this product among what they make. Company figures are quoted from each company's own website; every card states where the relationship came from.

Shanghai Ziasiot Technology
Shanghai, CN
Listed on the company's own website · profile compiled by CNFX from public sources

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

Technical documentation
Request current drawings, revision history, and a signed specification sheet.
Manufacturing capability
Verify equipment lists, process limits, capacity, and representative production evidence.
Inspection readiness
Confirm test methods, calibrated equipment, sampling plans, and traceable reports.
Supplier transparency
Check the legal entity, factory address, ownership, certifications, and direct contacts.

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Frequently Asked Questions

What is the operating principle of this mass flow controller?

It uses the thermal principle: a portion of gas flows through a sensor tube, and the heat transfer is measured to determine mass flow rate. The controller adjusts an internal valve to match the setpoint.

What are the typical flow rate and accuracy specifications?

The standard flow rate range is 0–100 SLM, with accuracy of ±1.0% FS and repeatability of ±0.2% FS. These are reference values; confirm for your specific model.

What materials are used in construction?

The body and wetted parts are stainless steel (316L), with a silicon sensor chip. Optional Hastelloy is available for wetted parts. Verify material compatibility for your gas and application.

What are the electrical and environmental requirements?

Supply voltage is 24 V DC ±10%, power consumption ≤4 W, and analog signals are 0–5 V DC. Operating temperature is -10 to 50 °C, and ingress protection is IP40. Ensure indoor use only.

Data Basis

Editorial classification, named public sources where available, and source-reviewed manufacturer records.

Preliminary Technical Classification
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