Tsarin gwajin ji na nesa na kwance yana ɗaukar fasahar ɗaukar hoto don gano fitar da carbon dioxide (CO2), carbon monoxide (CO), hydrocarbons (HC), da nitrogen oxides (NOX) daga sharar abin hawa. An tsara tsarin ne don duka motocin man fetur da dizal, kuma suna iya gano ɓarna, ɓarna (PM2.5), da ammonia (NH3) na motocin mai da dizal.
Tsarin gwajin ji na nesa na tsaye ya ƙunshi tushen haske da naúrar bincike, naúrar juyawar kusurwar dama, tsarin sayan sauri / hanzari, tsarin gano abin hawa, tsarin watsa bayanai, tsarin ma'aunin zafin jiki na majalisar ministocin, tsarin meteorological da naúrar aiki, wanda za'a iya sarrafa shi ta hanyar hanyar sadarwa.