HOBO® Pendant® MX Temp (MX2201) and
Temp/Light (MX2202) Logger Manual
21536-N
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 phone, tablet, or computer.
Using the HOBOconnect® app, you can easily configure the loggers, download logged data to a
mobile device or computer, 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
-20° to 70°C (-4° to 158°F) in air
-20° to 50°C (-4° to 122°F) in water
Accuracy
±0.5°C from -20° to 70°C (-4° to 158°F)
Resolution
0.04°C (0.072°F)
Drift
<0.1°C (0.18°F) per year
Response Time
17 minutes typical to 90% in air moving 1 m/s, unmounted
7 minutes typical to 90% in stirred water, unmounted
Light Sensor (MX2202)
Range
0 to 167,731 lux (15,582 lum/ft
2
)
Accuracy
±10% typical for direct sunlight (see
Light Measurement
on page 2 for
more details)
Logger
Logger Operating Range
-20° to 70°C (-4° to 158°F) in air
Buoyancy (Fresh Water)
2 g (0.07 oz) positive
Waterproof
To 30.5 m (100 ft)
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
Time Accuracy
±1 minute per month at 25°C (77°F)
Battery
CR2032 3V lithium, user replaceable
Battery Life
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.
Memory
96,000 measurements
Full Memory Download
Time
Approximately 45 seconds; may take longer the farther the device is
from the logger
Wetted Materials
Polypropylene case, EPDM O-ring
Dimensions
3.35 x 5.64 x 1.8 cm (1.32 x 2.22 x 0.69 inches)
Weight
12.75 g (0.45 oz)
Environmental Rating
IP68
The CE Marking identifies this product as complying with all relevant
directives in the European Union (EU).
See last page
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™,
or a Windows
computer with a native
BLE adapter or
supported BLE dongle
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)
MX2201 Model Shown
