微弱的雜散磁場對飛機的導航系統和控制信號均有干擾，國際航空運輸協會IATA將磁性貨物列為第9類危險品，在收取貨運時必須加以限制。對帶有磁性物質的空運貨物都需要進行磁性檢測，以便保證飛機的正常飛行。
Why do electronic products need to be magnetically inspected before they are shipped by air? Because the weak stray magnetic field interferes with the aircraft's navigation system and control signals, the International Air Transport Association IATA classifies magnetic cargo as Category 9 dangerous goods, which must be restricted when collecting cargo. Magnetic testing is required for air cargo with magnetic materials in order to ensure the normal flight of the aircraft.
空運貨物磁性檢測技術要求根據IATA DGR相關條款的規定：為航空運輸而包裝好的任何物質，如果距包裝件外表面任一點2.1m (7ft)處最大磁場強度低於0.159A/m(200nT)，則該物品不作為磁性物質受到限制，可以作為普通貨物收運。
The technical requirements for magnetic detection of air cargo are in accordance with the relevant provisions of IATA DGR: any substance packaged for air transportation, if the maximum magnetic field strength at any point 2.1m (7ft) from the outer surface of the package is less than 0.159A/m(200nT) , The article is not restricted as a magnetic substance and can be accepted and transported as a general cargo.
需要磁性檢測的貨物
Goods that require magnetic inspection
貨物需要做磁檢的包含磁鐵、磁塊、磁條等一系列磁性材料製造的產品。例如音響、麥克風等包含電機貨或者帶有磁性的都需要做磁檢。
The goods that need to be magnetically inspected include products made of a series of magnetic materials such as magnets, magnetic blocks, and magnetic strips. For example, speakers, microphones, etc., which contain motors or are magnetic, require magnetic inspection.
(1) 磁性材料: 磁體,磁鐵,磁鋼,磁釘,磁頭,磁條,磁片,磁塊,鐵氧體磁芯,鋁鎳鈷,電磁鐵,磁性流體密封圈,鐵氧體,斷油電磁鐵,稀土永磁體（馬達轉子）。
(1) Magnetic materials: magnets, magnets, magnetic steel, magnetic nails, magnetic heads, magnetic strips, magnetic sheets, magnetic blocks, ferrite cores, alnico, electromagnets, magnetic fluid seals, ferrites, broken Oil electromagnet, rare earth permanent magnet (motor rotor).
(2) 音響器材: 揚聲器，喇叭，喇叭音響/音箱，多媒體音箱，音響，CD，收錄機，迷你音響組合，揚聲器附件，話筒，汽車喇叭，麥克風，受話器，蜂鳴器，消聲器，放映器 訊響器，VCD，DVD。
(2) Audio equipment: speakers, horns, horn audio/speakers, multimedia speakers, audio, CD, radio cassette recorder, mini audio combination, speaker accessories, microphones, car horns, microphones, receivers, buzzers, mufflers, projectors Maker, VCD, DVD.
(3)其他: 電吹風,電視機,手機,電機,電機配件,玩具磁貼,磁性玩具零件,磁石加工品,磁性健康枕,磁保健品，指南針,汽車充氣泵,驅動器,減速器,旋轉件,電感器元件,磁線圈感測器,電動齒輪器,接力器,萬用表,磁控管,電腦及配件。
(3) Others: hair dryers, televisions, mobile phones, motors, motor parts, toy magnets, magnetic toy parts, magnet processing products, magnetic health pillows, magnetic health products, compasses, car air pumps, drives, reducers, rotating Components, inductor components, magnetic coil sensors, electric gears, servomotors, multimeters, magnetrons, computers and accessories.