Operating Principle
In-line fluid measurement instrumentation calculates true mass flow rates by detecting inertial phase shifts generated across vibrating conduit loops. When processing print pastes or dye bath concentrates, a coriolis flowmeter provides direct readings independent of fluid viscosity or thermal variations. Measurement stops when fluid cavitation or entrained gas bubbles decouple the fluid mass from conduit movement.
Tube Oscillation
Vibrating flow tubes oscillate at their natural resonant frequency under magnetic coil excitation. As fluid traverses the oscillating tubes of a coriolis flowmeter, Coriolis forces act in opposing directions on the inlet and outlet legs. This inertial opposition twists the tube geometry by an angle directly proportional to mass flow.
Optical or electromagnetic pickoffs register this phase lag with millisecond precision.
Chemical Dosing
Liquid chemical dispensing systems in automated textile dye kitchens verify continuous bath feed rates against target stock concentrations using this instrument. Because automated continuous coloration depends on precise gram-per-liter dosing without reliance on volumetric approximations, the coriolis flowmeter feeds mass velocity signals back to variable-speed progressive cavity pumps. A sudden change in chemical supplier specific gravity produces no error because mass remains constant despite volumetric shifts.
Calibration checks occur during annual meter water proving cycles against gravimetric scales. The instrument records process density alongside mass, providing simultaneous bath concentration verification.
Density Limitation
Aerated chemical suspensions and high-solid print gums introduce dampening effects that disrupt resonant tube oscillation. Extreme acoustic damping starves the coriolis flowmeter drive circuit of accurate phase information, forcing the sensor into fault status or intermittent zero drift.
