Mass Flow Meter/ Controller

Parameter	Specification
Media	Gas
Power Supply	24V DC / 230V AC
Output	0–5 V or 4–20 mA / RS485
Accuracy	1.5% of FS
Temperature	Up to 65°C
Pressure	Consult Factory
Connection	6 mm Ferrule Connection available

Key Features

Direct Mass Flow Measurement

• Direct mass flow measurement of gases
• No need for pressure & temperature compensation

High Accuracy

• Accuracy up to ±0.1%
• Ensures precise and reliable measurement

Wide Turndown Ratio

• Supports up to 50:1 or higher range
• Suitable for varying flow conditions

Fast Response

• Quick response to dynamic flow changes
• Ideal for real-time monitoring

Wide Flow Range

• Suitable for both low and high gas flow rates
• Flexible across multiple applications

Multi-Parameter Measurement

• Measures mass flow, temperature, and density*
• Provides comprehensive process data

Gas Compatibility

• Compatible with air, nitrogen, oxygen, natural gas, etc.
• Suitable for various industrial gases

No Moving Parts

• Ensures low maintenance and long service life
• No mechanical wear and tear

Robust Industrial Design

• Built for harsh industrial environments
• Durable and long-lasting performance

Digital Communication

• Supports HART, Modbus, and Profibus
• Easy integration with control systems

Easy Installation

• Minimal piping requirements
• Quick and simple installation

Working Principle

1. Thermal Mass Flow Meter (Most Common for Gas)

Works on the principle of heat transfer
A heated sensor is placed in the gas flow stream
Gas flowing past the sensor removes heat
The amount of heat loss is directly proportional to the mass flow rate
The instrument measures:
Temperature difference between heated sensor and reference sensor
Converts it into mass flow rate (kg/h or Nm³/h)
Best for:
Air, nitrogen, compressed gases
Low flow applications

Industrial Applications

Oil & Gas Industry

• Natural gas measurement
• Gas distribution and custody transfer
• Flare gas monitoring

Chemical & Petrochemical Plants

• Process gas flow control
• Reactor gas feed measurement
• Specialty gas dosing

Power Plants

• Combustion air measurement
• Fuel gas monitoring
• Boiler efficiency optimization

Steel & Metal Industry

• Furnace gas control (blast furnace, coke oven gas)
• Oxygen and nitrogen flow monitoring

Food & Beverage Industry

• CO₂ dosing in beverages
• Nitrogen flushing (packaging)
• Fermentation gas monitoring

Pharmaceutical Industry

• Clean gas flow (air, oxygen)
• Sterile process applications

Water & Wastewater Treatment

• Aeration air flow measurement
• Biogas flow monitoring

Electronics & Semiconductor Industry

• High-purity gas control
• Process gas monitoring in fabrication

HVAC & Building Systems

• Air flow measurement in ducts
• Energy management systems

Environmental Monitoring

• Emission monitoring systems
• Stack gas measurement

Technical Specifications

Parameter	Specification
Measurement Specifications
Measured Variable	Mass flow rate of gases
Flow Range	Thermal: 0.01 to 10,000 Nm³/h Coriolis: 0.1 to 100,000 kg/h
Accuracy	Thermal: ±1.0% of reading Coriolis: ±0.1% to ±0.5%
Repeatability	±0.2% to ±0.5%
Turndown Ratio	Up to 50:1 (Thermal up to ~100:1)
Response Time	≤ 1 second
Gas & Process Conditions
Suitable Gases	Air, Nitrogen (N₂), Oxygen (O₂), Natural Gas, CO₂, Biogas, etc.
Gas Condition	Clean and dry (thermal preferred)
Pressure Range	Vacuum up to 100 bar (model dependent)
Temperature Range	Process: −20°C to +200°C (thermal) Up to +350°C (Coriolis type)
Mechanical Specifications
Pipe Size	DN15 to DN300 (thermal inline)
Connection Type	Flanged / Threaded / Compression fitting
Sensor Type	Thermal dispersion sensor Coriolis vibrating tube
Material	Wetted parts: Stainless Steel (SS316 / SS304)
Protection Class	IP65 / IP67
Electrical Specifications
Power Supply	24 V DC / 85–265 V AC
Power Consumption	10–25 W
Output & Communication
Analog Output	4–20 mA
Digital Output	Modbus RTU / HART / Profibus
Pulse Output	Frequency / Totalizer output
Display	LCD / LED (Flow rate, total flow, temperature)

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