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LIQUID THERMAL MASS PRODUCTS

Thermal mass meters feature fast response, virtually zero maintenance, and precise measurement - all very important qualities among today's variety of applications. In the world of liquid flow measurement, they allow precision monitoring of microliter per minute flow rates.

McMillan Liquid Thermal Mass products utilize this thermal sensing technology. Flow passes through a small tube. This tube has two coils, one downstream from the other. Each coil is heated, and, as the liquid passes through the tube, the smart electronics sense the amount of heat transferred from one coil to the other. McMillan Company's patented* system insures that the zero remains stable and the sensor is extremely repeatable. The diagram on the right illustrates the sensing system design.

SENSING SYSTEM DIAGRAM
Flow rates as low as 0.05 mL/minute (50 μL/minute) and up to 10 mL/minute are possible. A linearized analog output signal is provided that corresponds to flow rate.

*US Patent 6,736,005. Other patents pending.