Chapter 9032 — Customs Tariff Headings

9032.20.00Manostats

9032.8Other instruments and apparatus:

9032.90.00Parts and accessories

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Products classified under Tariff item 90.32

Aquarium Digital Thermostat Controller

This submersible digital thermostat for aquarium heaters automatically cycles power to maintain precise water temperature. It is designed for aquarium applications. The product falls under tariff item 9032.10.90.

Aquarium Heater Thermostat

A submersible thermostat controller designed for aquarium heaters, it automatically maintains water temperature within a set range for tropical fish. It operates by sensing water temperature through a probe and cycling the heater to stabilize conditions, qualifying as an automatic temperature regulating instrument.

Automotive Cabin Thermostat

An electronic thermostat module for vehicle climate control systems that automatically regulates cabin air temperature by modulating blowers and valves. It uses sensors and feedback to maintain a desired temperature, fitting the definition of an automatic thermostat.

Beer Fermentation Temperature Controller

This digital thermostat for homebrew fermentation chambers maintains precise ale and lager temperatures with dual-stage control for cooling and heating. It is designed for brewing applications. The product is classified under tariff item 9032.10.90.

Carrier Cor Wall-Mount Programmable Thermostat

A wall-mount programmable thermostat for commercial refrigeration and heating systems, providing automatic setpoint maintenance through digital controls. It automatically regulates temperature, fitting the definition of an automatic thermostat.

Commercial Refrigerator Thermostat

A defrost thermostat for walk-in coolers that cycles compressors and defrost heaters to maintain precise food storage temperatures. It automatically regulates temperature based on probes and setpoints, making it an automatic thermostat for refrigeration applications.

Commercial Walk-In Cooler Thermostat

This heavy-duty thermostat regulates temperature in large walk-in refrigeration coolers, featuring defrost cycle control and alarm functions for automatic system management. It is designed for commercial refrigeration applications. The product falls under tariff item 9032.10.90 as an automatic thermostat.

Digital Room Thermostat

A battery-powered digital thermostat for home HVAC systems that automatically maintains room temperature by controlling heating and cooling equipment. It measures actual temperature and adjusts output to keep a desired setpoint, qualifying as an automatic thermostat.

Digital Room Thermostat for HVAC Systems

This programmable digital thermostat automatically regulates temperature in residential or commercial HVAC systems by sensing ambient air and controlling heating and cooling equipment. It features programmable schedules for energy efficiency. This product qualifies under tariff item 9032.10.90.

Duct-Mounted Air Conditioning Thermostat

This duct-mounted thermostat measures and regulates supply air temperature in central air conditioning systems automatically. It is installed in HVAC ductwork to maintain consistent temperatures. The product falls under tariff item 9032.10.90 as an automatic thermostat.

Ecobee SmartThermostat Wall Mount

A wall-mount smart thermostat with voice control that automatically manages temperature in air conditioning and heating systems. It includes radar occupancy sensors for energy-efficient regulation, qualifying as an automatic thermostat.

Electronic Refrigeration Thermostat Controller

This electronic thermostat automatically controls compressor operation in commercial refrigeration units by monitoring cabinet temperature and maintaining set points. It is designed for reliable temperature management. The product is classified under tariff item 9032.10.90.

Emerson Sensi Touch Wall Thermostat

A Wi-Fi enabled wall-mount thermostat for precise control of heating, ventilation, and air conditioning systems. It features a touch-screen interface and app connectivity for remote temperature regulation, fitting the definition of an automatic thermostat.

Explosion-Proof Heating Thermostat for Hazardous Locations

This certified explosion-proof thermostat controls heating in hazardous location environments like chemical plants, automatically regulating temperature safely. It is designed for use in explosive atmospheres. The product falls under tariff item 9032.10.90 as an automatic thermostat.

Greenhouse Climate Thermostat

A ventilation thermostat for greenhouses that activates fans and vents to regulate daytime and nighttime temperatures automatically. It uses sensor-based control to maintain optimal growing conditions, fitting the definition of an automatic thermostat.

Honeywell T6 Pro Wall-Mount Thermostat

A programmable smart thermostat designed for wall mounting in residential and commercial HVAC systems. It automatically regulates temperature in air conditioning, refrigeration, and heating systems, qualifying as an automatic thermostat.

Incubator Temperature Thermostat

A precision thermostat for laboratory incubators that maintains 37°C with alarms for deviations. It uses PID stabilization to automatically control temperature, making it an automatic thermostat for scientific applications.

Industrial Oven Thermostat

A PID digital thermostat for controlling high-temperature industrial baking ovens, using feedback loops for precise ±1°C accuracy. It automatically maintains set temperatures, qualifying as an automatic thermostat for industrial applications.

Johnson Controls T9100 Wall-Mount Thermostat

A wall thermostat series offering single-stage control for air conditioning and heating, automatically stabilizing temperatures against disturbances. It is built for surface or recessed wall mounting, fitting the definition of an automatic thermostat.

Lennox iComfort S30 Wall Thermostat

The Lennox iComfort S30 is an ultra-smart wall-mount thermostat that automatically manages up to 8-stage HVAC systems for heating and cooling. It uses AI-driven adjustments and remote sensors to provide zoned temperature control. This product qualifies under tariff item 9032.10.90 as an automatic regulating instrument for temperature control.

Line Voltage Heating System Thermostat

This heavy-duty line voltage thermostat directly controls electric baseboard or radiant heating systems, automatically maintaining room temperature. It operates at line voltage without a transformer. The product qualifies under tariff item 9032.10.90.

Line Voltage Heating Thermostat

A heavy-duty thermostat for baseboard electric heaters that directly switches 240V lines to regulate room heat based on bimetallic strip sensing. It automatically controls temperature, fitting the definition of an automatic thermostat.

Line Voltage HVAC Thermostat

A line-voltage thermostat designed to directly control electric heating systems in commercial buildings. It automatically switches power to maintain a set temperature, making it an automatic regulating instrument under tariff item 9032.10.90.

Millivolt Gas Fireplace Thermostat

A millivolt thermostat for gas fireplaces that automatically adjusts flame height to maintain a desired room temperature. It operates without external power, relying on the millivolt generated by the pilot flame, and qualifies as an automatic thermostat.

Nest Learning Thermostat Wall Mount Model

The Google Nest Learning Thermostat is an intelligent wall-mountable device that learns user preferences to automatically optimize HVAC system performance. It uses sensors and algorithms to adjust temperature settings for heating and cooling. This product falls under tariff item 9032.10.90 as an automatic thermostat.

Oven Cavity Thermostat

A high-temperature thermostat designed for electric oven cavities, maintaining cooking temperatures automatically. It is rated for operation above 500°F and includes safety cut-off features, classifying it as a thermostat under tariff item 9032.10.90.

Pool Heater Digital Thermostat Controller

This digital thermostat regulates gas or electric pool heaters, maintaining water temperature automatically with outdoor sensor compensation. It is designed specifically for pool heating applications. The product falls under tariff item 9032.10.90.

Pool Water Heater Thermostat

A digital thermostat for swimming pool heat pumps that regulates water temperature to 80-104°F via flow sensors. It automatically controls temperature, stabilizing against outdoor fluctuations, making it an automatic thermostat for pool applications.

Programmable WiFi Smart Thermostat

A WiFi-enabled smart thermostat with app control, occupancy sensors, and learning algorithms for residential heating and cooling. Despite its connectivity features, its primary function is automatic temperature regulation, placing it under tariff item 9032.10.90.

Programmable Zone Thermostat for Multi-Zone HVAC

This programmable zone thermostat automatically balances temperatures across different building zones while integrating with central HVAC controllers. It is designed for multi-zone systems. The product is classified under tariff item 9032.10.90.

Refrigerator Electronic Thermostat

An electronic thermostat module for household refrigerators, featuring defrost cycle control and temperature regulation using an NTC sensor. It automatically maintains cooling temperatures, qualifying as a thermostat under tariff item 9032.10.90.

RV Air Conditioner Thermostat

A 12V DC thermostat for recreational vehicle air conditioners, providing automatic temperature regulation and fan speed control. It is designed for mobile HVAC systems and qualifies as a thermostat under tariff item 9032.10.90.

Solar Water Heater Thermostat

A differential thermostat for solar thermal water heaters that activates pumps based on temperature differences between collectors and storage tanks. It includes freeze protection and qualifies as an automatic thermostat under tariff item 9032.10.90.

Sous Vide Immersion Thermostat

A precision immersion circulator thermostat for sous vide cooking, maintaining exact water bath temperatures with ±0.1°C accuracy and continuous stirring. It functions as an automatic thermostat for cooking, classifying under tariff item 9032.10.90.

Terrarium Reptile Thermostat

A proportional thermostat for reptile terrariums, controlling heat mats and lamps to maintain basking temperatures with nighttime drop programming. It automatically regulates temperature for pet habitats, qualifying under tariff item 9032.10.90.

Trane ComfortLink II Wall Thermostat

The Trane ComfortLink II is a communicating wall-mount thermostat that integrates with variable-speed HVAC systems for automatic control of temperature, humidity, and ventilation. It maintains system balance in refrigeration and heating applications. This thermostat is classified under tariff item 9032.10.90.

Underfloor Heating Mat Thermostat

This specialized thermostat controls electric underfloor heating mats, with floor sensor input for automatic temperature maintenance and energy efficiency. It is designed for radiant floor heating systems. The product falls under tariff item 9032.10.90.

Water Bath Thermostat Circulator

An integrated thermostat for laboratory water baths, maintaining circulation temperature with automatic PID control and overtemperature protection. Despite lab use, its basic thermostat function places it under tariff item 9032.10.90.

WiFi Smart Thermostat

An app-controlled WiFi thermostat that learns user habits to optimize heating and cooling cycles automatically. Its core function is measuring and regulating temperature to a desired setpoint, qualifying as an automatic thermostat despite connectivity features.

WiFi Smart Thermostat for Central Air Systems

This WiFi smart thermostat provides remote control of central HVAC systems with adaptive learning algorithms for automatic temperature regulation. It features connectivity for smartphone control. The product qualifies under tariff item 9032.10.90.

Bioreactor Pressure Manostat

A specialized manostat designed for bioreactors that automatically maintains sterile gas pressure during cell cultivation. It achieves this through real-time pressure monitoring and valve actuation, ensuring stable conditions for biological processes.

Digital Vacuum Manostat

A digital manostat that automatically regulates and maintains vacuum pressure levels in laboratory systems. It continuously monitors pressure and adjusts to a set value, ensuring precise control for experimental processes.

HVAC Zone Pressure Manostat

An electronic manostat for building HVAC systems that automatically maintains differential pressure in cleanrooms or isolation zones. It modulates supply air to stabilize pressure, ensuring environmental control in sensitive areas.

Industrial Process Manostat Controller

An automated manostat controller for maintaining precise pressure in chemical processing lines. It uses PID control algorithms to stabilize gas or liquid pressure, ensuring consistent process conditions.

Laboratory Gas Manostat Regulator

A precision manostat for regulating gas pressure in analytical instruments, featuring electronic feedback to maintain constant pressure despite flow variations. It ensures accurate readings in laboratory equipment.

Pneumatic Tool Pressure Manostat

A compact manostat for maintaining consistent air pressure to robotic pneumatic grippers and tools in automated assembly lines. It automatically regulates pressure to prevent tool malfunction from fluctuations.

Semiconductor Wafer Processing Manostat

An ultra-precise manostat for semiconductor etch and deposition chambers, maintaining chamber pressure at 10^-6 torr levels automatically. It ensures high-vacuum conditions critical for semiconductor manufacturing.

Electro-Pneumatic Proportional Pressure Regulator

> This electro-pneumatic proportional pressure regulator converts an electrical control signal into a proportional pneumatic pressure output. It continuously measures the downstream pressure and adjusts the internal valve to maintain the desired setpoint, making it an automatic regulating instrument. Because its final control element operates pneumatically, it is classified as a pneumatic instrument under tariff item 9032.81.00.

Hydraulic Accumulator Charging Regulator

This hydraulic accumulator charging regulator automatically controls charging rates to hydraulic accumulators based on bladder pressure feedback. As a hydraulic automatic regulating instrument, it falls under tariff item 9032.81.00.

Hydraulic Cylinder Position Regulator

> This hydraulic cylinder position regulator automatically maintains precise piston positions in industrial hydraulic cylinders by continuously sensing the position and adjusting the hydraulic flow to correct any deviation. It stabilizes the position against disturbances, making it an automatic regulating instrument. As a hydraulic device, it falls under tariff item 9032.81.00.

Hydraulic Flow Compensator Regulator

This hydraulic flow compensator regulator automatically compensates for flow variations to ensure consistent actuator speeds in hydraulic systems. Its hydraulic automatic regulation places it under tariff item 9032.81.00.

Hydraulic Flow Control Meter

> This hydraulic flow control meter automatically measures and regulates the flow rate of hydraulic fluid in industrial pipelines. It uses sensors to detect the actual flow and adjusts a valve to maintain the desired rate against variations, functioning as an automatic regulating instrument. Since it operates hydraulically, it is classified under tariff item 9032.81.00.

Hydraulic Fluid Velocity Regulator

> This hydraulic fluid velocity regulator automatically controls the velocity of hydraulic fluid in pipelines to maintain consistent process speeds. It uses flow sensors and actuators to continuously measure the velocity and adjust the flow, stabilizing against disturbances. As a hydraulic automatic regulating instrument, it falls under tariff item 9032.81.00.

Hydraulic Level Controller

> This hydraulic level controller automatically controls the level of hydraulic fluid in industrial reservoirs by using sensors to measure the actual level and adjusting the flow to maintain the desired setpoint. It continuously corrects deviations, making it an automatic regulating instrument. As a hydraulic device, it is classified under tariff item 9032.81.00.

Hydraulic Level Control Valve for Hydraulic Reservoirs

> This hydraulic level control valve automatically regulates the fluid level in hydraulic reservoirs by sensing the actual level and adjusting the flow of hydraulic fluid into or out of the reservoir. It continuously measures the level and corrects deviations from the setpoint, making it an automatic regulating instrument. Because it operates hydraulically, it is classified under tariff item 9032.81.00.

Hydraulic Level Regulator for Fluid Tanks

This hydraulic level regulator automatically controls liquid levels in hydraulic tanks by measuring actual levels and adjusting inlet/outlet flows to stabilize at desired setpoints. It qualifies as a hydraulic automatic regulating instrument under tariff item 9032.81.00.

Hydraulic Load Force Controller

> This hydraulic load force controller automatically regulates the force output in hydraulic presses and lifts by using pressure feedback to stabilize against load variations. It continuously measures the force and adjusts the hydraulic pressure to maintain the desired value, making it an automatic regulating instrument. As a hydraulic device, it falls under tariff item 9032.81.00.

Hydraulic Pressure Regulator for Industrial Machinery

This hydraulic pressure regulator automatically maintains constant pressure in hydraulic systems by continuously measuring and adjusting fluid flow in response to pressure variations. It falls under tariff item 9032.81.00 as a hydraulic automatic regulating instrument.

Hydraulic Pressure Regulator Valve

> This hydraulic pressure regulator automatically maintains a constant pressure in industrial hydraulic systems by continuously measuring the fluid pressure and adjusting the flow to keep it at the desired setpoint. It stabilizes the pressure against disturbances, qualifying as an automatic regulating instrument. As a hydraulic device, it falls under tariff item 9032.81.00.