Apure portable dissolved oxygen analyzer

Model: DO-71 $r $n ● Mainly used for sewage, river water, aquaculture, etc. $r $n ● Can display temperature and dissolved oxygen values simultaneously $r $n ● Power supply: Four alkaline batteries No. 7 $r $n ● Response time: not more than 30 seconds (90% response at 20 ° C) $r $n ● Residual current: not more than 0.15mg/L