Alkali Dosing Profiles and Mass Transfer in Jet Dyeing
Controlled progressive alkali dosing matches jet fabric loop velocity to eliminate surface fixation spikes and secure level shade fixation on cellulosic cloth.
Toroidal Conductivity Sensor
Inductive Monitoring
Electromagnetic coupling provides the method for measuring electrolytic solution strength in continuous chemical processing loops. A toroidal conductivity sensor detects liquid ion concentration by inducing an alternating current within the fluid path and sensing the resultant loop magnitude. Primary insulation protects the internal coils from aggressive chemical attack by hazardous dyes or concentrated finishing agents.
Non-contact design eliminates signal drift caused by polarization or debris accumulation on the sensing surface.
Circuit Geometry
The arrangement utilizes two internal wire windings housed inside a protective plastic or ceramic casing. An oscillator energizes the drive coil to generate a magnetic field that forces ionic migration within the surrounding liquid media. The liquid forms a secondary winding of a transformer, where the magnitude of current flow relates directly to the solution conductivity.
A receiving coil converts this induced current back into an electronic signal for the controller.
Production Verification
Textile wet processing stages rely on these devices to regulate chemical dosing in scouring and bleaching baths. High-solids wastewater streams often contain particulates that foul conventional metallic electrodes, but the toroidal configuration avoids surface contact issues. Dyehouses monitor concentrated liquor storage tanks to confirm agent strength before batch injection into the beck or jet machine.
Consistent output prevents uneven shade development on synthetic fibres during continuous dyeing cycles.
Measurement Accuracy
Variations in liquid temperature alter ionic mobility and trigger shifts in reported conductivity levels. Electronic compensators adjust the raw signal against a reference value to ensure stability across fluctuating thermal conditions. Signal integrity remains high even when the sensor body accumulates significant scaling or organic film deposits.
This operational resilience makes the technology superior to electrode-based meters for heavy-duty industrial fabric manufacturing.