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HOBO® Pendant® MX Temp (MX2201) and
Temp/Light (MX2202) Logger Manual
MX2201 Model Shown
HOBO Pendant MX
Logger
Models:
• MX Temp (MX2201)
• MX Temp/Light
(MX2202)
Required Items:
• HOBOconnect app
• Mobile device with
Bluetooth and iOS,
iPadOS®, or Android™
Accessories:
• Mounting boot 5-pack
(BOOT-MX2201-2202)
• Solar radiation shield
(RS1 or M-RSA)
• Mounting bracket for
solar radiation shield
(MX2200-RS-BRACKET)
• Replacement O-rings
(MX2201-02-ORING)
21536-L
HOBO Pendant MX loggers measure temperature (MX2201) or temperature/light (MX2202) in
indoor and outdoor environments. Designed for durability, these compact, waterproof loggers
can be used in numerous applications, including fresh and salt water. The loggers are
Bluetooth® Low Energy-enabled for wireless communication with a mobile device. Using the
HOBOconnect™ app, you can easily configure the loggers, download logged data to your phone
or tablet, or automatically upload the data to HOBOlink® for further analysis. You can also
configure the loggers to calculate statistics, set up alarms to trip at specific thresholds, or
enable burst logging in which data is logged at a faster interval when sensor readings are above
or below certain limits.
Specifications
Temperature Sensor (MX2201 and MX2202)
Range
Accuracy
Resolution
Drift
Response Time
Light Sensor (MX2202)
Range
Accuracy
Logger
Logger Operating Range
Buoyancy (Fresh Water)
Waterproof
Radio Power
Transmission Range
Wireless Data Standard
Logging Rate
Time Accuracy
Battery
Battery Life
Memory
Full Memory Download
Time
Wetted Materials
Dimensions
Weight
Environmental Rating
-20° to 70°C (-4° to 158°F) in air
-20° to 50°C (-4° to 122°F) in water
±0.5°C from -20° to 70°C (-4° to 158°F)
0.04°C (0.072°F)
<0.1°C (0.18°F) per year
17 minutes typical to 90% in air moving 1 m/s, unmounted
7 minutes typical to 90% in stirred water, unmounted
2
0 to 167,731 lux (15,582 lum/ft
)
±10% typical for direct sunlight (see Light Measurement on page 2 for
more details)
-20° to 70°C (-4° to 158°F) in air
2 g (0.07 oz) positive
To 30.5 m (100 ft)
1 mW (0 dBm)
Approximately 30.5 m (100 ft) line-of-sight
Bluetooth Low Energy (Bluetooth Smart)
1 second to 18 hours
±1 minute per month at 25°C (77°F)
CR2032 3V lithium, user replaceable
1 year typical at 25°C (77°F) with logging interval of 1 minute and
Bluetooth Always On enabled in software.
2 years typical at 25°C (77°F) with logging interval of 1 minute and
Bluetooth Always On disabled in software.
Faster logging intervals and statistics sampling intervals, burst logging,
remaining connected with the app, excessive downloads, and paging
may impact battery life.
To ensure proper battery installation, see Battery Information for
detailed instructions on replacing the battery.
96,000 measurements
Approximately 45 seconds; may take longer the farther the device is
from the logger
Polypropylene case, EPDM O-ring
3.35 x 5.64 x 1.8 cm (1.32 x 2.22 x 0.69 inches)
12.75 g (0.45 oz)
IP68
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
See last page
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Table of Contents
Related Manuals for Hobo MX2201
Summarization of Contents
Specifications
Temperature Sensor
Details the temperature sensor's range, accuracy, resolution, drift, and response time.
Light Sensor
Details the light sensor's range and accuracy, crucial for MX2202 model.
Logger Specifications
Lists key logger specifications including operating range, waterproof rating, radio, memory, and battery life.
Logger Components and Operation
Light Measurement Accuracy
Explains the MX2202 light sensor's spectral response and angular accuracy compared to an ideal cosine response.
Getting Started
Guides users through installing the app and connecting to the logger for initial use.
Configuring the Logger
Logging Interval Settings
Allows selection of the data recording frequency for the logger.
Start Logging Configuration
Defines when the logger begins recording data, including immediate, delayed, or button-initiated starts.
Stop Logging Configuration
Specifies how the logger stops recording data, such as memory full or manual stop.
Logging Mode Selection
Enables selection between fixed interval logging and burst logging modes for data collection.
LED Indicator Control
Controls whether the logger's status and alarm LEDs are illuminated during operation.
Bluetooth Always On Setting
Manages the logger's Bluetooth advertising for wireless communication and its impact on battery life.
Setting up Alarms
Configure Alarm Limits and Duration
Defines high/low sensor thresholds and the time duration before an alarm is triggered.
Alarm Indication Clearing
Specifies whether alarm indications clear automatically when sensors return to normal or require logger reconfiguration.
Burst Logging
Set Burst Logging Intervals and Conditions
Configures faster logging intervals and specifies sensor thresholds for activating burst logging.
Statistics Logging
Select Logging Mode and Statistics
Choose fixed logging and specify which statistics (min, max, avg, std dev) to record.
Set Statistics Sampling Interval
Defines the sampling rate used to calculate statistics within each logging interval.
Deploying and Mounting the Logger
Mounting Boot Guidelines
Details how to correctly install the logger into its optional mounting boot for secure attachment.
Other Deployment Guidelines
Offers advice on weighting, securing, and protecting the logger in water and sun.
Battery Information
Battery Replacement Procedure
Step-by-step instructions for safely removing and replacing the logger's CR2032 battery.
Need help?
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Questions and answers