Other
Automatic regulating or controlling instruments and apparatus; parts and accessories thereof: > Other instruments and apparatus: > Other: > Other
Duty Rate (from China)
Except for products described in headings 9903.03.02–9903.03.11, articles the product of any country, as provided for in subdivision (aa) of U.S. note 2 to this subchapter
Except as provided in headings 9903.88.05, 9903.88.06, 9903.88.07, 9903.88.08, 9903.88.10, 9903.88.11, 9903.88.14, 9903.88.19, 9903.88.50, 9903.88.52, 9903.88.58, 9903.88.60, 9903.88.62, 9903.88.66, 9903.88.67, 9903.88.68, or 9903.88.69, articles the product of China, as provided for in U.S. note 20(a) to this subchapter and as provided for in the subheadings enumerated in U.S. note 20(b) [to this subchapter]
Subheadings
Products classified under HTS 9032.89.60
Industrial pH Control Controller
An electronic controller that automatically monitors and adjusts pH levels in industrial water treatment systems by dosing chemicals based on real-time sensor feedback. It falls under HTS 9032.89.60 as an automatic regulating instrument for controlling liquid chemical properties in process industries. Designed to maintain pH at precise setpoints against disturbances.
Automatic Pressure Regulators for Pneumatic Systems
Electro-pneumatic regulators that automatically maintain constant output pressure in air systems despite input fluctuations, using feedback loops. Classified in HTS 9032.89.60 for automatic control of gas pressure variables in industrial applications. Prevents over-pressurization in manufacturing lines.
Temperature Process Controllers for Ovens
PID temperature controllers that automatically regulate heating elements in industrial ovens to maintain set temperatures via thermocouple feedback. HTS 9032.89.60 covers these automatic thermal regulation instruments for manufacturing processes. Features alarms for setpoint deviations.
Flow Rate Automatic Controllers for Pipelines
Instruments that automatically adjust valves to maintain constant flow rates in liquid pipelines using flowmeter feedback and PID algorithms. Falls under HTS 9032.89.60 as automatic regulators for liquid flow variables in industrial fluid systems. Stabilizes against pressure disturbances.
Humidity Control Systems for Cleanrooms
Automatic controllers that regulate humidifiers/dehumidifiers to maintain precise RH levels in pharmaceutical cleanrooms via sensor feedback. Classified HTS 9032.89.60 for automatic environmental control instruments meeting chapter note 4(b) criteria. Includes data logging.
Level Control Instruments for Storage Tanks
Ultrasonic level controllers that automatically operate pumps/valves to maintain liquid levels in chemical storage tanks with disturbance compensation. HTS 9032.89.60 for automatic liquid level regulators in industrial applications. Features empty/high level alarms.
Speed Regulators for Conveyor Motors
Variable frequency drives (VFDs) that automatically maintain conveyor belt speeds despite load variations through closed-loop feedback. Under HTS 9032.89.60 as automatic controllers for mechanical speed variables in material handling. Meets chapter note automatic control definition.
DO Control Systems for Wastewater Treatment
Dissolved oxygen controllers that automatically adjust aeration blowers in wastewater plants to maintain optimal DO levels via probe feedback. HTS 9032.89.60 covers these automatic process regulators for biological treatment. Stabilizes against organic load variations.
Cascade Pressure Controllers for Gas Systems
Multi-stage pressure controllers maintaining sequential pressure setpoints in compressed gas cascade filling systems automatically. Classified HTS 9032.89.60 for automatic gas pressure regulation in industrial filling operations. Features pressure sequencing logic.
ORP Process Controllers for Water Disinfection
ORP controllers automatically dosing disinfectants to maintain oxidation-reduction potential in water treatment for pathogen control. HTS 9032.89.60 as automatic chemical process regulators. Compensates for flow and contamination variations.