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ST102 Mass Flow Meter
A dual-element insertion thermal mass flow meter developed for large pipes, ducts and installations with poor flow profiles.
Designed to improve average flow measurement accuracy across larger or more challenging gas flow applications.
The FCI ST102 Thermal Mass Flow Meter is a high-performance dual-sensor thermal mass flow meter designed specifically for large diameter pipes, ducts and industrial gas flow applications where flow profiles are irregular or insufficient straight pipe lengths are available.
Based on the proven ST100 platform, the ST102 uses two independent sensing points connected to a single transmitter to create an averaged flow measurement, significantly improving measurement accuracy in difficult installation conditions.
In many industrial applications, large pipework and ducting systems contain elbows, dampers, fans, valves or process equipment close to the measurement location. These create turbulent and uneven flow profiles which can negatively impact the performance of conventional single-point flow meters.
The ST102 is specifically designed to overcome these challenges.
By averaging flow readings from two separate sensor locations, the ST102 provides far more stable and representative flow measurement across distorted flow profiles, making it ideal for demanding industrial gas applications.
The ST102 is commonly used for:
- Combustion air flow measurement
- Flare gas metering
- Industrial ventilation systems
- Large process gas ducts
- Refinery and petrochemical applications
- Emissions monitoring systems
- Hazardous area gas measurement
Using advanced thermal dispersion technology, the ST102 measures gas mass flow directly without requiring pressure or temperature compensation.
Its rugged industrial design supports reliable operation in harsh process conditions including high temperatures, hazardous areas and mixed hydrocarbon gas streams.
Key Features
- Dual sensor averaging technology
- Designed for irregular flow profiles
- Ideal for large diameter pipes and ducts
- Improved accuracy in limited straight pipe installations
- Direct gas mass flow measurement
- No moving parts for long-term reliability
- Based on the proven ST100 platform
- Suitable for challenging industrial environments
Process & Performance Features
- SIL1 certified
- ATEX certified
- Process temperatures up to +450°C
- 1000:1 turndown ratio
- 316 stainless steel or Hastelloy C wetted parts
- Mixed hydrocarbon gas calibrations available
- 4-20mA, HART, Profibus PA and Foundation Fieldbus H1 communications
Why Dual Sensor Averaging Matters
Single-point flow meters can struggle in applications where the gas flow profile is uneven or unstable due to turbulence created by upstream process equipment.
The ST102 solves this problem by averaging two independent sensing locations, reducing the impact of flow distortion and improving overall measurement stability and accuracy.
This makes the ST102 particularly effective where:
- Straight pipe runs are limited
- Large ducts create uneven flow distribution
- Turbulent gas flow conditions exist
- Process conditions are difficult or unpredictable
Typical Applications
- Combustion air flow measurement
- Industrial flare gas systems
- Boiler air monitoring
- Process ventilation systems
- Refinery gas measurement
- Petrochemical processing
- Large duct and stack monitoring
Key Benefits
- Improved accuracy in disturbed flow conditions
- Reliable measurement in large ducts and pipework
- Reduces errors caused by irregular flow profiles
- Excellent low-flow sensitivity and turndown capability
- Suitable for hazardous industrial environments
- Proven thermal mass technology for demanding gas applications
Over 45 Years in Operation
1000's of UK Installations
Supporting 100's of UK Sites
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