Specifications

HOBOMXSoilMoisture(MX2306) andMXSoilMoistureandTemperature(MX2307)DataLoggerManual
1‐508‐759‐9500(U.S.andInternational) 2 www.onsetcomp.com
1‐800‐LOGGERS(U.S.only)
TimeAccuracy ±1minutepermonth0°to50°C(32°to122°F)
BatteryType 2/3AA3.6Voltlithium,userreplaceable
BatteryLife 2years,typicalwithloggingintervalof1minuteandBluetooth
AlwaysOnenabled;5years,typicalwithloggingintervalof1
minuteandBluetoothAlwaysOndisabled.Fasterlogging
intervalsandstatisticssamplingintervals,burstlogging,
remainingconnectedwiththeapp,excessivedownloads,and
pagingmayimpactbattery
life.
Memory 110,000measurements,maximum(472KB)
FullMemoryDownload
Time
Approximately60seconds;maytakelongerthefurtherthe
deviceisfromthelogger
Dimensions Loggerhousing:10.8x5.08x2.24cm(4.25x2.0x0.88in.)
Soilmoisturesensor:7.5x5.1x2.4cm(2.95x2.02x0.95inches)
Soilmoisturesensorneedlelength:5.4cm(2.13inches)
Soilmoisturesensorneedlediameter:0.32cm(0.13inches)
Temperaturesensor(MX2307)
diameter:0.53cm(0.21in.)
Sensorcablelength:2m(6.56ft) 
Weight MX2306:229g(80oz) 
MX2307:267g(94oz) 
Materials Logger:Acetal,siliconegasket,stainless‐steelscrews
SoilMoistureSensor:ASAplasticbodywithpolyurethaneepoxy
fillingandstainless‐steelpins
TemperatureSensor(MX2307):Stainless‐steelwaterprooftip
Cable:PVC,UVresistantandrodentrepellent(soilmoisture
sensorcable)
EnvironmentalRating Logger:‐25to60°C(‐13to140°F);weatherproof;NEMA6and
IP67
SoilMoisturesensorandcable:‐40to60°C(‐40to140°F)
Temperaturesensorandcable(MX2307):Immersioninwaterup
to50°C(122°F)for1year

TheCEMarkingidentifiesthisproductascomplyingwithall
relevantdirectivesintheEuropeanUnion(EU).

TheUKCAmarkingidentifiesthisproductascomplyingwithall
relevantdirectivesintheUKDeclarationofConformity.

Seelastpage
*Foradditionalaccuracy,t hesensordatacanbepost‐calibratedforaparticularsoilbyapplyingacalibrationequation
tothedataexportedfromtheapp.

LoggerComponentsandOperation
 
MountingHoles:Usetheholesatthetopandbottomofthe 
loggertomountit(seeDeployingandMountingtheLogger).
AlarmLED:ThisLEDblinksredevery4secondswhenanalarm
istripped(unlessShowLEDisdisabledasdescribedin
ConfiguringtheLogger).
StatusLED:This
LEDblinksblueevery4secondswhenthe
loggerislogging(unlessShowLEDisdisabledasdescribedin
ConfiguringtheLogger).Iftheloggeriswaitingtostartlogging
becauseitwasconfiguredtostart“OnButtonPush”orwitha
delayedstart,itwillblinkevery8seconds.
StartButton:Pressthisbuttontowakeupthelogger;boththe
alarmandstatusLEDswillblink.Oncetheloggerisawake,
pressthisbuttontomoveittothetopof thedeviceslistinthe
app.Pressthisbuttonfor3secondstostartorstopthe
logger
whenitisconfiguredtostartorstop“OnButtonPush”(see
ConfiguringtheLogger).BothLEDswillblinkfourtimeswhen
youpressthebuttontostartorstoplogging.Pressthisbutton
for10secondstoresetapassword(seeSettingaPassword).
MX2307modelshown
AlarmLED
Mounting
Holes
StartButton
ExternalSensor
StatusLED