美國ECO公司生產(chǎn)，廉價的擴散氧檢測儀DO3特點：1.無傳感器污垢，無特定的探頭安裝2.沒有水接觸3.可以讓非專業(yè)人員明白4.可替換的電池5.低費用，無消耗品6.可存儲10個數(shù)據(jù)7.簡單重復的瓶采樣方法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.