1. Tsuas yog ntsuas qhov kub ntawm qhov chaw, thiab tus pas ntsuas kub infrared tsis tuaj yeem ntsuas qhov kub ntawm sab hauv.
2. Lub wavelength saum 5um tsis tuaj yeem ntsuas los ntawm quartz iav. Cov iav muaj qhov cuam tshuam tshwj xeeb thiab kis tau tus yam ntxwv, thiab qhov ntsuas kub infrared tsis raug tso cai. Txawm li cas los xij, qhov ntsuas kub tuaj yeem ntsuas los ntawm lub qhov rais infrared. Cov ntsuas kub infrared yuav tsum tsis txhob siv rau qhov ntsuas kub ntawm qhov ci lossis polished hlau (stainless steel, aluminium, thiab lwm yam).
3. Nrhiav qhov chaw kub. Txhawm rau nrhiav qhov chaw kub, qhov ntsuas yuav tsum tsom mus rau lub hom phiaj, thiab tom qab ntawd luam theej lub hom phiaj nce thiab nqis kom txog thaum qhov kub tau txiav txim siab.
4. Ua tib zoo saib xyuas cov xwm txheej ib puag ncig: chav, plua plav, pa taws, thiab lwm yam. Nws thaiv cov khoom siv kho qhov muag thiab tiv thaiv qhov ntsuas kub kom raug.
5. Ambient kub, yog tias tus pas ntsuas kub dheev raug rau qhov kub ntawm qhov sib txawv ntawm 20 degree lossis siab dua, tso cai rau lub ntsuas kub hloov mus rau qhov ntsuas kub ntawm ambient li ntawm 20 feeb.