Cov ntawv qhia cov av noo feem ntau yog ua los ntawm cov ntawv dawb huv, feem ntau yog siv cov ntawv siab zoo - zoo nkauj blotting paper. Hom ntawv no zoo nqus cov av noo- cov tshuaj rhiab heev thiab tso cai rau cov xim hloov pauv nrog cov av noo. Qhov taw qhia cov dots ntawm daim npav muaj cov ntawv blotting impregnated nrog cov dej noo-sensing tov. Nyob ntawm seb lawv puas muaj cobalt, lawv tuaj yeem muab faib ua ntau hom:
Cobalt-muaj Daim Npav Humidity Indicator: Cov no siv cov khoom siv cobalt xws li cobalt chloride lossis cobalt bromide ua cov dej noo-sensing khoom. Lawv yog xiav thaum qhuav thiab tig liab qab tom qab absorbing noo noo. Txawm li cas los xij, vim tias cobalt chloride raug cais raws li Pawg 2 carcinogen raws li EU Txoj Cai 2004/73 / EC, cov khoom no tsis ua raws li RoHS ib puag ncig cov qauv thiab lawv siv tau maj mam txwv, tshwj xeeb tshaj yog cov khoom xa tawm mus rau EU.
Cobalt-Dawb Humidity Indicator Cards: Cov no siv ib puag ncig tus phooj ywg cobalt- cov tshuaj dawb los hloov cobalt chloride, ua tiav ntau yam xim- hloov kev sib txuas xws li xiav rau liab, daj rau ntsuab, thiab xim av rau xiav. Lawv ua raws li EU RoHS cov lus qhia thiab REACH cov cai thiab tau siv dav hauv thaj chaw muaj kev nyab xeeb thiab kev nyab xeeb, xws li cov khoom siv hluav taws xob, cov khoom siv hluav taws xob, thiab cov cuab yeej kho qhov muag.
Qhov loj me muaj xws li 103mm × 38mm × 0.04mm. Nws txhawb kev hloov kho cov av noo (xws li 10% ~ 60%) thiab ua raws li cov qauv kev lag luam xws li IPC/JEDEC J-STD-033D thiab MIL-I-8835A.