Portable gas detector yuav muab faib ua ob hom: diffusion hom thiab twj tso kua mis hom:
1. Lub diffusion hom roj ntes: muaj lub zog siv me me thiab cov khoom ntim tuaj yeem me dua. Kev kuaj pom roj zoo ib yam li hom olfactory ntawm tib neeg lub cev. Gas concentration yog kuaj los ntawm cov pa diffusion contact sensor.
2. Pump suction gas detector, vim hais tias ntawm lub tshuab nqus tsev twj tso kua mis ua hauj lwm sampling, yog li ntawd lub hwj chim noj thiab ntim yuav inevitably nce, tab sis vim hais tias ntawm cov roj twj tso kua mis sampling, muaj peev xwm ua tau sai thiab meej gas detection. Nws yog qhov tsim nyog rau cov xwm txheej ntawm kev kuaj thiab kuaj, xws li cov roj concentration hauv cov kav dej thiab cov roj concentration hauv qhov chaw sib khi. Cov no yog txhua yam tsim nyog rau lub twj tso kua mis suction gas detector los ua kom pom kev ua haujlwm yooj yim dua.
