... -accuracy:0.2%,0.5%,1.0% 2>LCD display,output:pulse,4-20mADC 3>Explode-proof:Ex d11 BT4/Ex ib ... sea water,ammonia,acetometer,etc4.Bi-direction Pulse,4~20mADC,total and rate display in the field.5.Power supply 5~24VDC ... .6.Explode-proof Ex d11 BT4/Ex ib 17.spectrum 2,4 ...