U.S. Customs and Border Protection · CROSS Database · 2 HTS codes referenced
Primary HTS Code
8531.10.0045
$56.5M monthly imports
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Ruling Age
32 years
Data compiled from CBP CROSS Rulings, Census Bureau Trade Data · As of 2026-04-28 · Updates monthly
The tariff classification of gas monitoring units from Canada.
NY 887089 June 15, 1993 CLA-2-85 90:S:N:N1:112 887089 CATEGORY: Classification TARIFF NO.: 8531.10.0045 9027.10.2000 Ms. Judy Campbell W.Y. Moberly, Inc. U.S. Customs Broker Box 164 Sweetgrass, Montana 59484 RE: The tariff classification of gas monitoring units from Canada. Dear Ms. Campbell: This classification decision under the Harmonized Tariff Schedule of the United States (HTS) is being issued in accordance with the provisions of Section 177 of the Customs Regulations (19 C.F.R. 177). DATE OF INQUIRY : May 31,1993 ON BEHALF OF : B&W Technologies Ltd. DESCRIPTION OF MERCHANDISE : The self-contained gas monitoring units include the Oxyclip, Toxyclip, Pack Rat, Alarm Rat, and Plant Rat. They are all comprised of a sensor (to measure the parts per million of a gas) and electronics (to determine when the gas goes beyond the designated range. They are used to alert people to a potentially dangerous situation by either sounding an alarm or flashing a light. The Oxyclip and the Toxyclip do not have the ability to give visual readouts of the gas measurements. The Pack Rat, Alarm Rat, and Plant Rat, have the ability to display visual readouts of the gas level measurements, in addition to the audible alarm tone and the flashing lights. HTS PROVISION : Electric sound or visual signalling apparatus: Burglar or fire alarms and similar apparatus... Other: Other... for the Oxyclip and Toxyclip. HTS SUBHEADING : 8531.10.0045 RATE OF DUTY : 2.7 percent ad valorem HTS PROVISION : Gas or smoke analysis apparatus: Electrical... for the Pack Rat, Alarm Rat, and Plant Rat. HTS SUBHEADING : 9027.10.2000 RATE OF DUTY : 4.9 percent ad valorem DUTY CONCESSION : Goods classifiable under subheadings 8531.10.0045 and 9027.10.2000, HTS, which have originated in the territory of Canada, will be entitled to a free rate of duty under the United States-Canada Free Trade Agreement (FTA) upon compliance with all applicable regulations. A copy of this ruling letter should be attached to the entry documents filed at the time this merchandise is imported. If the documents have been filed without a copy, this ruling should be brought to the attention of the Customs officer handling the transaction. Sincerely, Jean F. Maguire Area Director New York Seaport