... 5%,1.0%,0.5% 3.no zero point deviation 4.rapid response,high sensitivity SpecificationsLiquid flow meter 1>Hi-accuracy ... :0.2%,0.5%,1.0% 2>LCD display,output:pulse,4-20mADC 3>Explode-proof:Ex d11 BT4/Ex ib ... same with sea water,ammonia,acetometer,etc4.Bi-direction Pulse,4~20mADC,total and rate display in the field.5.Power ... Explode-proof Ex d11 BT4/Ex ib 17.spectrum 2,4,6,10,15,25,40,50,80,100,150, ...