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HOBO® MX2300 Series Data Logger Manual 

20923-O 

The HOBO MX2300 series data loggers record and transmit temperature and/or relative 
humidity (RH) in outdoor or indoor environments. These Bluetooth® Low Energy (BLE)-enabled 
loggers are designed for wireless communication with a phone, tablet, or computer. Using the 
HOBOconnect® app, you can easily configure the logger and then download logged data to view 
or export for further analysis. The logger can calculate minimum, maximum, average, and 
standard deviation statistics and be configured to indicate alarms at thresholds you specify. The 
logger also supports burst logging in which data is logged at a faster interval when sensor 
readings are above or below certain limits. The Temp and Temp/RH models have internal 
sensors while the External Temp/RH, External Temp, and 2x External Temp include built-in 
external sensors, offering a wide range of solutions for monitoring temperature and RH in 
numerous applications. 

Specifications 

Temperature Sensor 

 

Range 

MX2301A and MX2305 internal sensors: -40 to 70°C (-40 to 158°F) 
MX2302A external temperature sensor: -40 to 70°C (-40 to 158°F) 
MX2303 and MX2304 external sensors: -40 to 100°C (-40 to 212°F), with 
tip and cable immersion in fresh water up to 50°C (122°F) for one year 

Accuracy 

±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F) 
±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F) 
±0.25°C from 70 to 100°C (±0.45 from 158 to 212°F), MX2303 and 
MX2304 only 

Resolution 

MX2301A and MX2302A: 0.02°C (0.036°F) 
MX2303, MX2304, and MX2305: 0.04°C (0.072°F) 

Drift 

<0.01°C (0.018°F) per year 

Relative Humidity Sensor* (MX2301A, MX2302A only)

 

Range 

0 to 100% RH, -40° to 70°C (-40° to 158°F); exposure to conditions 
below -20°C (-4°F) or above 95% RH may temporarily increase the 
maximum RH sensor error by an additional 1% 

Accuracy 

±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including 
hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical 

Resolution 

0.01% 

Drift 

<1% per year typical 

Response Time (typical, to 90% of change)

 

Temperature Without 

Solar 

Radiation Shield 

With RS1/M-RSA 
Solar Radiation Shield

 

With RS3-B Solar 
Radiation Shield

 

 MX2301A 

 

internal sensor 

17 minutes in air 
moving 1 m/sec 

24 minutes in air 
moving 1 m/sec 

NA 

 MX2302A 

 

external sensor 

3 minutes, 45 seconds 
in air moving 1 m/sec 

7 minutes, 45 
seconds in air 
moving 1 m/sec

 

6 minutes, 30 
seconds in air 
moving 1 m/sec

 

 MX2303/MX2304 

external sensors 

3 minutes in air 
moving 1 m/sec; 20 
seconds in stirred 
water 

7 minutes in air 
moving 1 m/sec

 

4 minutes in air 
moving 1 m/sec

 

 MX2305 

 

internal sensor 

17 minutes in air 
moving 1 m/sec 

24 minutes in air 
moving 1 m/sec

 

NA 

RH Without 

Solar 

Radiation Shield

 

With RS1/M-RSA 
Solar Radiation Shield

 

With RS3-B Solar 
Radiation Shield

 

 MX2301A 

 

internal sensor 

30 seconds in air 
moving 1 m/sec 

40 seconds in air 
moving 1 m/sec 

NA 

 MX2302A 

 

external sensor 

15 seconds in air 
moving 1 m/sec 

30 seconds in air 
moving 1 m/sec 

30 seconds in air 
moving 1 m/sec 

 

 

HOBO MX2300 Series  
Data Logger 

Models: 

 

MX2301A, temp/RH 

 

MX2302A, ext temp/RH 

 

MX2303, 2 ext temp 

 

MX2304, ext temp 

 

MX2305, temp 

Included Items: 

 

Screws 

 

Cable ties 

Required Items: 

 

HOBOconnect app 

 

Mobile device with 
Bluetooth and iOS, 
iPadOS®, or Android™, or a 
Windows computer with a 
native BLE adapter or 
supported BLE dongle 

Accessories: 

 

Solar radiation shield  
(RS3-B for use with 
MX2302A, MX2303, and 
MX2304 models; RS1 or M-
RSA for use with MX2301A 
and MX2305 models) 

 

Mounting bracket for solar 
radiation shield (MX2300-
RS-BRACKET), for use with 
MX2301A and MX2305 
models 

 

Replacement battery  
(HRB-2/3AA) 

 

 

MX2301A Model Shown 

Содержание MX2300 Series

Страница 1: ...ow 20 C 4 F or above 95 RH may temporarily increase the maximum RH sensor error by an additional 1 Accuracy 2 5 from 10 to 90 typical to a maximum of 3 5 including hysteresis at 25 C 77 F below 10 RH...

Страница 2: ...rval 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 ba...

Страница 3: ...uter 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 t...

Страница 4: ...ays after logging begins Stop When Memory Fills The logger continues recording data until the memory is full 8 Tap Pause Options then select Pause On Button Push to specify that you can pause the logg...

Страница 5: ...low limit This means the logger records data every 5 minutes as long as the temperature remains between 85 F and 32 F Once the temperature rises above 85 F the logger switches to the faster logging r...

Страница 6: ...ion and the more memory is required 6 Enter a value in Statistics Sampling Interval to use for calculating statistics The rate must be less than and a factor of the logging interval For example if the...

Страница 7: ...r facing down If the sensor is being deployed in an RS3 B solar radiation shield mount it vertically as shown below When deploying a logger with external sensors MX2302A MX2303 and MX2304 mount the lo...

Страница 8: ...cations However there is no guarantee that interference will not occur in a particular installation If this equipment does cause harmful interference to radio or television reception which can be dete...

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