Thermal Dispersion Technology |
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The typical thermal mass sensing element contains
two thermowell-protected Resistance Temperature
Detectors (platinum RTDs). When placed in the
process stream, one RTD is heated and the other RTD
senses the process temperature. The temperature
difference between the two RTDs is related to the
process flow rate as well as the properties of the
process medium. Higher flow rates or denser media
cause increased cooling of the heated RTD and a
reduction in the RTD temperature difference.
Advantages of Thermal Dispersion (thermal mass flow meters):
 No moving parts, orifices, bearings or seals to
foul or fail
Accuracy for precision flow measurement,
especially in low flow applications
Repeatability for consistent measurement in
complex process environments
Wide flow range and wide turndowns for a broad
range of applications
Highly reliable and dependable in rugged process
environments
Easy installation with reduced maintenance
requirements
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