Specifications

HOBOMXSoilMoisture(MX2306) andMXSoilMoistureandTemperature(MX2307)DataLoggerManual
1‐508‐759‐9500(U.S.andInternational) 3 www.onsetcomp.com
1‐800‐LOGGERS(U.S.only) 
ExternalSensor:Thisisthesoilmoisture(andtemperature
sensorinMX2307model)attachedtothebottomofthelogger.
SoilMoistureSensorComponentsand
Operation
Thesoilmoisturesensormeasuresthevolumetricwater
content(VWC)ofsoilusingstainless‐steelneedles.Aferrite
corepositionedonthesensorcable7.6cm(3inches)away
fromthesensorheadisusedtoisolatethesensorfromany
interferencesinthesystem.Thismitigatesanypotentialnoise
from
thesystemonthemeasuredsensordata.
Important:Donotattachanythingtothesectionofthe
cablebetweenthesensorheadandtheferritecoreas
thismayinfluencethemeasurements.

TheVWCmeasurementsensitivityiscontainedwithina430mL
volumeroughlydepictedinthefollowingfigures.Notethatthe
sensorismostsensitivetothemoistureintheareaclosestto
theneedles,soitiscriticalthattherearenoairgapsaround the
needles.
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

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
DownloadingtheAppand
ConnectingtoaLogger
Installtheapptoconnecttoandworkwiththelogger.
1. DownloadHOBOconnecttoaphoneortabletfromthe App
Store®orGooglePlay™.
DownloadtheapptoaWindowscomputerfrom
www.onsetcomp.com/products/software/hoboconnect.
2. OpentheappandenableBluetoothinthedevicesettingsif
prompted.
3. Pressthe
buttonontheloggertowakeitup.
4. TapDevicesandthentaptheloggerintheapptoconnect
toit.
Iftheloggerdoesnotappearorifitishavingtrouble
connecting,followthesetips:
 Makesuretheloggeris“awake”bypressingthestart
button.ThealarmandstatusLEDswillblinkoncewhen
theloggerwakesup.Youcanalsopressthebuttona
secondtimetobringtheloggertothetopof thelistif
workingwithmultipleloggers.
 Makesuretheloggeriswithinrangeofthemobiledevice
or
computer.Therangeforsuccessfulwireless
communicationisapproximately30.5m(100ft)withfull
line‐of‐sight.
 Ifthereareseveralloggersinthearea,movethelogger
toalocationwithfewerloggers.Interferencecan
sometimesoccurwhennumerousloggersareinone
location.
 Ifyour
devicecanconnecttotheloggerintermittentlyor
losesitsconnection,moveclosertothelogger,within
sightifpossible.
 Iftheloggerappearsintheapp,butcannotbe
connected,closetheappandthenpowerdownthe
devicetoforcethepreviousBluetoothconnectio nto
close.
Oncethe
loggerisconnected,youcan:
Tapthis: Todothis:

Selectloggersettingsandsavethemontothe
loggertostartlogging.SeeConfiguringthe
Logger.

Readout(offload)loggerdata.SeeReadingOut
theLogger.
WARNING:Riskof
personalinjuryis
present.Sensorneedle
pointsareextremely
sharpandwillpuncture
skin.Handlewithcare.
Ferritecore