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
