HOBO® MX2300 Series Data Logger Manual
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The HOBO MX2300 series data loggers record and transmit temperature and/or relative
humidity (RH) in outdoor environments. These Bluetooth® Low Energy-enabled loggers are
designed for wireless communication with a mobile device. Using the HOBOmobile® app, you
can easily configure the logger, read it out, and view data on your phone or tablet, or export
the data for further analysis. The logger can calculate minimum, maximum, average, and
standard deviation statistics and be configured to trip alarms at thresholds you specify. The
logger also supports burst logging in which data is logged at a different 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 outdoor temperature and
RH.
Specifications
Temperature Sensor
Range
MX2301 and MX2305 internal sensors: -40 to 70°C (-40 to 158°F)
MX2302 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
0.04°C (0.072°F)
Response Time
(Typical to 90%)
MX2301 and MX2305 internal sensors:
xx
minutes in air moving 1 m/sec
MX2302 external temperature sensor:
xx
minutes in air moving 1 m/sec
MX2303 and MX2304 external sensors:
xx
minutes in air moving 1 m/sec;
xx
seconds in stirred water
Stability (Drift)
<0.01°C (0.018°F) per year
Relative Humidity Sensor* (MX2301, MX2302 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, see Plot A for full range
Resolution
0.05% at 25°C (77°F)
Response Time
(Typical to 90%)
MX2301:
xx
minute in air moving 1 m/sec with protective cap
MX2302:
xx
minutes in air moving 1 m/sec with protective cap
(Stability) Drift
<1% per year typical
Logger
Operating Range
-40° to 70°C (-40° to 158°F)
Radio Power
1 mW (0 dBm)
Transmission Range
Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard
Bluetooth Low Energy (Bluetooth Smart)
Logging Rate
1 second to 18 hours
Logging Modes
Fixed interval (normal, statistics) or burst
Memory Modes
Wrap when full or stop when full
Start Modes
Immediate, push button, date & time, or next interval
Stop Modes
When memory full, push button, date & time, or after a set logging period
Restart Mode
Push button
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
PLACEHOLDER
HOBO MX2300 Series
Data Logger
Models:
•
MX2301, temp/RH
•
MX2302, ext temp/RH
•
MX2303, 2 ext temp
•
MX2304, ext temp
•
MX2305, temp
Included Items:
•
Screws
•
Cable ties
Required Items:
•
HOBOmobile app
•
Device with iOS and
Bluetooth
Accessories:
•
Solar radiation shield (RS1
or M-RSA)
•
Mounting bracket for solar
radiation shield (MX2300-
RS-BRACKET), for use with
MX2301 and MX2305
models
•
Replacement battery
(HP-B)
