DOS-1703 portable dissolved oxygen meter yog qhov zoo tshaj plaws rau ultra-low zog microcontroller ntsuas thiab tswj, tsis tshua muaj zog noj, muaj kev ntseeg siab, ntsuas ntse, siv cov ntsuas polarographic, tsis hloov cov pa oxygen.Muaj kev txhim khu kev qha, yooj yim (ib tes ua haujlwm), thiab lwm yam.