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ST80 Mass Flow Meter

A mid-range insertion thermal mass flow meter designed for more demanding gas applications and elevated process temperatures.

Fully programmable and suitable for pipe sizes from 3” to 36”, with live insertion and digital communication options.

The FCI ST80 Thermal Mass Flow Meter is a versatile insertion thermal mass flow meter designed for accurate and reliable gas flow measurement across a wide range of industrial process and utility gas applications.

Combining robust industrial construction with simple installation and advanced programmability, the ST80 provides dependable direct gas mass flow measurement without requiring additional pressure or temperature compensation.

Its insertion-style design makes the ST80 particularly well suited to medium and large pipe sizes where installation flexibility, low maintenance and cost-effective flow measurement are important.

The ST80 is widely used for:

  • Compressed air monitoring
  • Combustion air flow measurement
  • Nitrogen and oxygen flow monitoring
  • Industrial process gases
  • Utility gas systems
  • Ventilation and exhaust monitoring
  • General industrial gas measurement

Designed for straightforward installation and long-term reliability, the ST80 can be inserted and removed under process pressure using a standard full-bore ball valve, allowing simplified maintenance and installation without full system shutdown.

Using proven thermal dispersion technology, the ST80 delivers stable and repeatable performance across varying process conditions while maintaining excellent low-flow sensitivity and wide turndown capability.

 

Reliable Thermal Mass Flow Measurement

The ST80 measures gas mass flow directly, eliminating the need for separate pressure and temperature compensation commonly required with other flow technologies.

Key advantages include:

  • Direct mass flow measurement
  • No moving parts
  • Low maintenance operation
  • Excellent low-flow sensitivity
  • Wide turndown performance
  • Stable measurement across changing gas conditions

 

Designed for Industrial Process Applications

The ST80 is ideal for industrial environments requiring robust and flexible gas flow measurement.

Its insertion configuration makes it particularly suitable for:

  • Pipe sizes from 3” to 36”
  • Large duct and pipe installations
  • Utility and process gas systems
  • Retrofit applications
  • Hazardous area installations

The meter provides a practical and cost-effective solution for applications where full-bore inline meters would be difficult or expensive to install.

 

Key Features

  • Insertion thermal mass flow meter for gases
  • Direct gas mass flow measurement
  • Fully programmable electronics
  • Live insertion and removal capability
  • No pressure or temperature compensation required
  • No moving parts for long-term reliability
  • LCD display for flow rate and total flow
  • Suitable for industrial and hazardous area applications

 

Process & Performance Features

  • ATEX certified
  • SIL1 compliant
  • Process temperatures up to +450°C
  • Pipe sizes from 3” to 36”
  • 316 stainless steel wetted parts
  • 4-20mA, HART and Profibus communications

 

Typical Application

  • Compressed air systems
  • Combustion air flow monitoring
  • Nitrogen generation systems
  • Oxygen monitoring
  • Industrial process gases
  • Ventilation and exhaust systems
  • Utility gas measurement

 

Key Benefits

  • Easy installation in large pipework systems
  • Live insertion and removal reduces downtime
  • Reliable low-flow performance
  • Low maintenance with no moving parts
  • Cost-effective solution for industrial gas flow measurement
  • Proven thermal mass technology for demanding applications

 

View/Download Product Manual

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