HS Code for Pressure controller

Pressure controllers, specifically those functioning as automatic manostats, are classified under HS code 903220. This classification is determined by the device's function as an automatic regulating or controlling instrument. Under the Harmonized System, Chapter 90 covers optical, photographic, measuring, and checking instruments. Heading 9032 specifically addresses automatic regulating or controlling instruments and apparatus. Subheading 903220 is reserved for manostats, which are devices designed to maintain a pressure of a liquid or gas at a pre-set level, or to follow a predetermined program of pressure changes, regardless of disturbances. These devices typically consist of a sensing element, a control mechanism, and an actuator. The classification applies when the device automatically compares the measured pressure to a set point and takes corrective action to minimize the deviation. This distinguishes them from simple measuring gauges, as the controller must have the capability to influence the process variable to maintain a specific state.

Products Included

• Automatic pressure regulators
• Electronic manostats with feedback loops
• Pneumatic pressure controllers
• Differential pressure controllers
• Digital manostats for industrial automation

Common Misclassification

Pressure controllers are often misclassified under 902620, which is for instruments that only measure or check pressure without providing automatic control. Another common error is using 8481, which covers valves; while a controller may operate a valve, the instrument that performs the automatic regulation logic is classified in 903220. Additionally, if the device is a simple electrical switch triggered by pressure, it might be confused with 8536, but if it functions as a manostat, 903220 takes precedence.

FAQ

What is the HS code for pressure controller?

The HS code for an automatic pressure controller or manostat is 903220.

How does a controller differ from a pressure gauge?

A pressure gauge (902620) only displays or measures the pressure, whereas a pressure controller (903220) actively regulates the pressure to maintain a set point.