Multi-Point Gas Mass Flow Meters for Large Ducts and Stacks

Sierra Instruments MultiTrak™ 670S is an advanced state-of-the-art thermal mass flow meter system for the measurement of mass flow

• Non-uniform velocity profiles
• High turn-down requirements
• Dirty gas streams
• Wide temperature ranges
• Fast velocity and temperature changes

The MultiTrak 670S dynamically compensates for changes in the flow profile by using up to four independent mass flow sensing points to measure the instantaneous average gas mass flow velocity. The 670S is most commonly used in:  

• petrochemical refining
• coal-fired electric power generation
• steel manufacturing

and many other industrial processes that face the task of accurate and repeatable gas mass flow measurement in very large pipes or ducts.

Operating Principal: Thermal dispersion technology for direct mass flow measurement featuring no pressure or temperature compensation needed, no moving parts, low pressure drop, high turndown.

MultiTrak 670S Gas Mass Flow Meter suitable applications

• Immersible Thermal Mass Flow Meter
• Waste Water Treatment

MultiTrak 670S benefits

• Range measurement 2 to 20,000 sfpm (100 smps)
• Accurage measurement of mass flow rate in large pipes or ducts
• No drift DrySense velocity sensor
• Lifetime warranty on sensor
• Touch screen
• Field Configurable
• Pipe sizes up to 72 inces (2M)
• Low pressure and hot taps available
• Very low pressure drop
• No moving parts
• Flow range adjustable
• Dual range capability
• Field validation & configuration
• Flow totaliser and alarms
• Hazardous area location enclosure (IP66) and NEMA 4X (IP65)

MultiTrak 670S Flow Meter Document Downloads

DOWNLOAD PDF  for the MultiTrak 670S Multipoint Gas Mass Flow Meter 

How Thermal Mass Flow Meter Technology works