Of smoke detectors, ionization type
Apparatus based on the use of X-rays or of alpha, beta, gamma or other ionizing radiations, whether or not for medical, surgical, dental or veterinary uses, including radiography or radiotherapy apparatus, X-ray tubes and other X-ray generators, high tension generators, control panels and desks, screens, examination or treatment tables, chairs and the like; parts and accessories thereof: > Other, including parts and accessories: > Other: > Parts and accessories: > Other: > Of smoke detectors, ionization type
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
Products classified under HTS 9022.90.70.00
Detector Head Connector Harness for Ionization Units
Multi-conductor harness linking ionization chamber to main PCB in modular smoke detectors. HTS 9022.90.70.00 for signal transmission from radiation sensor in smoke apparatus. Strain-relief design for 20-year service.
Tamper-Resistant Cover for Ionization Smoke Sensors
Locking dust cover specific to ionization chamber exposure in commercial detectors. Provides radiation shielding when not in service. HTS 9022.90.70.00 accessory protecting ionizing apparatus components.
Ionization Chamber Module for Smoke Detectors
This is the core detection component in ionization-type smoke detectors that uses a small amount of radioactive material to ionize air between two electrodes, detecting smoke particles by changes in current flow. It falls under HTS 9022.90.70.00 as a part specifically for ionization smoke detectors, which rely on ionizing radiation for operation. These modules are precision-engineered for residential and commercial fire safety systems.
Americium-241 Source Assembly for Ionization Smoke Alarms
A sealed radioactive source containing Americium-241, the key ionizing element in smoke detectors that emits alpha particles to create ionizable air. Classified under HTS 9022.90.70.00 as an essential part of ionization-type smoke detectors using ionizing radiation. These assemblies are rigorously tested for safety and longevity in fire detection devices.
Ionization Smoke Detector Printed Circuit Board
Custom PCB designed exclusively for ionization smoke detectors, integrating amplification circuits for the ionization chamber signal and low-power processing. Falls under HTS 9022.90.70.00 as a dedicated part for apparatus using ionizing radiation in smoke detection. Essential for converting radiation-induced current changes into audible alarms.
Replacement Ionization Chamber for Residential Smoke Alarms
Factory replacement ionization chamber for popular household smoke detectors like First Alert models, containing the radioactive foil and electrodes. HTS 9022.90.70.00 applies as a part of ionizing radiation-based smoke detection apparatus. Designed for easy snap-in installation to extend detector life.
High-Sensitivity Ionization Sensor for Commercial Fire Systems
Advanced ionization sensor for duct-mounted commercial smoke detection systems, optimized for fast response in HVAC applications. Classified HTS 9022.90.70.00 for its use of alpha radiation in smoke particle detection within fire alarm apparatus. Meets NFPA 72 standards for large building protection.
Ionization Smoke Detector Test/Reset Button Assembly
Integrated test and hush button module specific to ionization smoke detectors, including circuitry to verify radiation chamber operation. Under HTS 9022.90.70.00 as a functional part testing ionizing radiation response in smoke apparatus. User-friendly design reduces nuisance alarms.
Sealed Electrode Assembly for Ion Smoke Detectors
Corrosion-resistant electrode pair hermetically sealed for ionization chambers in battery-powered smoke detectors. HTS 9022.90.70.00 covers this critical part enabling current flow detection from alpha particle ionization. 10-year service life design.
Ionization Detector Mounting Bracket Kit
Quick-connect mounting bracket specifically engineered for ionization smoke detectors in residential ceilings. Falls under HTS 9022.90.70.00 as an accessory dedicated to ionizing radiation smoke apparatus positioning. Tamper-resistant design meets hotel safety codes.
Battery Contact Assembly for Ionization Alarms
Corrosion-proof battery contacts designed for 10-year sealed ionization smoke detectors. HTS 9022.90.70.00 as part ensuring continuous power to radiation detection circuitry. Meets lithium battery safety standards.
Ionization Smoke Detector Sound Chamber Assembly
Acoustic chamber optimized for 85dB alarm tone in ionization-type detectors. Classified HTS 9022.90.70.00 as integral part amplifying radiation detection alerts. Frequency-matched to human hearing response curve.
Radioactive Shielding Can for Smoke Detector Sources
Titanium shielding canister containing the Am-241 source in ionization chambers. HTS 9022.90.70.00 for radiation containment in smoke detection apparatus parts. <1% external radiation per NRC limits.
Ionization Chamber Airflow Window Assembly
Insect-screened airflow aperture for ionization smoke detector sensing chambers. Specific HTS 9022.90.70.00 part enabling smoke particle entry to radiation field. 10-micron filtration prevents false alarms.
Calibration Jig for Ionization Chamber Testing
Precision test fixture verifying ionization chamber sensitivity during manufacturing. Uses known radiation sources to calibrate smoke detection threshold. HTS 9022.90.70.00 as accessory for ionizing smoke apparatus quality control.