美国ECO公司生产，廉价的扩散氧检测仪DO3特点：1.无传感器污垢，无特定的探头安装2.没有水接触3.可以让非专业人员明白4.可替换的电池5.低费用，无消耗品6.可存储10个数据7.简单重复的瓶采样方法SpecificationsRanges0.00-5.00PPM(mg/l)Accuracy 25%(0-1ppm); 30%(1-2ppm)whenoperatednearroomtemperatureResponsetime2minuteswillgiveyouagreaterthan90%valueMeasurementPrincipleTransducertechnologyT-serieselectrochemical(3ET1PO3)InterferencesDissolvedchlorineSize3.13 1.56 1.36-in(HxWxD)8.5 3.5 6-cmWeight2-oz(49g)OperatingTemperature45-95F(7 35C)WaterTemperature68 86F(20-30C)recommendedBatteryReplaceableCR2450coinbatteryAlarmAudiblebuzzerandbacklightCalibrationEvery1yr.isrecommendedWarranty1yr.fromdateofpurchaseDisplayLCDreadoutin0.01mg/Lincrements2.1AboutMeasurementsDO3byEcoSensors(adivisionofKWJEngineering)isafast,easytousedeviceforcheckingtheozoneconcentrationinwaterandiscalibratedinmg/L(sameasparts-per-millionbyweightinwater).Thissmall,battery-operateddetectoroffersaninexpensivealternativetomorecostlyinlinemonitorsandrequiresnodisposablereagents.DO3isapractical,versatiledetectorforapplicationswheretheuserneedstoconfirmthepresenceofozoneinwater.DO3providesfastreadings(5minutesorless),withtypicalaccuracyof 25%.DO3measurestheozoneintheairspaceabovethesample,usingHenry sLawwhichdescribestheratiobetweentheozoneactuallypresentinthewaterandtheozoneintheairimmediatelyabovethesurfaceofthewater.Whileaffectedtosomeextentbytemperatureandatmosphericpressure,thismeasurementissufficientlyaccurateforuseinawiderangeofozonatedwaterapplicationsandcompareswelltomorecostlyanalyticalinstrumentsandtheinconvenientcolorimetricdeterminations.