First Alert CO400B Carbon Monoxide Alarm

Battery-operated electrochemical carbon monoxide detector that sounds visual/audible alarms for fire safety systems. Similar apparatus under HTS 8531.10.0045 for gas detection tied to fire alarms.

Import Duty Rates by Country of Origin

Origin CountryMFN RateCh.99 SurchargesTotal Effective Rate
🇨🇳China1.3%+35.0%36.3%
🇲🇽Mexico1.3%+10.0%11.3%
🇨🇦Canada1.3%+10.0%11.3%
🇩🇪Germany1.3%+10.0%11.3%
🇯🇵Japan1.3%+10.0%11.3%

Alternative Classifications

This product could be classified differently depending on its characteristics or intended use.

9027.10Lower: 10% vs 36.3%

If sold as gas/smoke analysis instrument

Laboratory or industrial gas detectors classify under Chapter 90 measuring instruments.

8531.10.00Same rate: 36.3%

If hardwired residential installation

Hardwired CO/fire combination alarms use the 0040 statistical suffix.

Not sure which classification is right?

Our AI classifier can analyze your specific product and recommend the correct HTS code with confidence.

Import Tips & Compliance

UL 2034 certification essential; specify sensor life (5-7 years); avoid mixing with smoke-only declarations