Direct- nyeem ntawv spectrometers tuaj ntau hom nyob ntawm lawv daim ntawv thov thiab tsim, tab sis lawv txhua tus feem ntau muaj siab - muaj peev xwm txheeb xyuas qhov tseeb. Portable spectrometer pom zoo hauv peb lub khw tsis tsuas yog txhawb kev tsim khoom lag luam xwb tab sis kuj tau txais txiaj ntsig los ntawm kev siv keeb kwm yav dhau los ntawm German tuam txhab MW (Marzhauser Wetzlar), kom ntseeg tau tias muaj kev ntseeg siab thiab qhov tseeb ntawm kev ntsuas. Nws lub wavelength range npog 350nm-14µm, nrog rau qhov tseeb ntawm ± 0.00005 thiab rov ua dua ntawm ± 0.00002, ua rau nws zoo tagnrho rau ntau yam kev xav tau kev tshuaj xyuas. Tshwj xeeb, nws qhov kev ua haujlwm siab-wavelength raug ± 0.05% thiab daws teeb meem wavelength<1nm-makes the analytical results more accurate and reliable.
