
HOBO Pendant® MX Temperature/Light Data Logger
Requires a compatible mobile device or Windows computer and the HOBOconnect app. System requirements for the app can be found at the bottom of the HOBOconnect software page.
Overview
A waterproof temperature/light-level logger using the power of Bluetooth to deliver accurate data straight to your mobile device or Windows computer running Onset's free HOBOconnect app. Designed for durability, this compact is ideal for measuring temperature in streams, lakes, oceans, and soil environments. Data collection in the field has never been easier!
Add the MX Gateway. for access to your data in Onset's cloud-based HOBOlink software (indoor deployments).
Mounting Requirements: It is very important that the logger housing does not become distorted when mounted. When mounting these loggers to any non-flat surface, such as rebar or posts, we recommend using the Mounting Boot (BOOT-MX2201-2201). This boot is also useful for mounting loggers so that they can be easily removed for service.A waterproof temperature/light-level logger using the power of Bluetooth to deliver accurate data straight to your mobile device or Windows computer running Onset's free HOBOconnect app.
- New light sensor offers more accurate light intensity readings for light in the visible light spectrum
- Convenient wireless setup and download via Bluetooth
- Large memory stores 96,000 measurements
- Waterproof to 30 meters (100 feet)
- User-replaceable battery
- Mounting tabs for fast, easy deployment
- LED alarm notifies you when temperature exceeds set threshold
- Works with Onset’s free HOBOconnect app
- ±0.5°C (±0.9°F) temperature accuracy and ±10% light accuracy typical for direct sunlight
In what environment does this data logger operate?
This data logger operates in indoor, outdoor and water environments.
What measurements does this data logger support?
The MX2202 data logger supports the following measurements: Light Intensity, Soil Temperature, Temperature and Water Temperature
The country of origin for this product is the United States. To see the full specifications for this product, please see our product manual found under the documentation tab if available.
Choose measurement system:
Some specifications display both measurement systems and/or refer to other similar products when mentioned.
Temperature Sensor (MX2201 and MX2202) | |
Range | -20° to 70°C in air
(-4° to 158°F in air)
-20° to 50°C in water
(-4° to 122°F in water)
|
Accuracy | ±0.5°C from -20° to 70°C
(±0.5°C from -4° to 158°F)
|
Resolution | 0.04°C
(0.072°F)
|
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
(0 to 15,582 lum/ft2)
|
Accuracy | ±10% typical for direct sunlight (see Light Measurement on page 2 for more details) |
Logger | |
Logger Operating Range | -20° to 70°C in air
(-4° to 158°F in air)
|
Buoyancy (Fresh Water) | 2 g positive
(0.07 oz positive)
|
Waterproof | To 30.5 m
(To 100 ft)
|
Radio Power | 1 mW
(0 dBm)
|
Transmission Range | Approximately 30.5 m line-of-sight
(Approximately 100 ft line-of-sight)
|
Wireless Data Standard | Bluetooth Low Energy (Bluetooth Smart) |
Logging Rate | 1 second to 18 hours |
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 |
Compliance Marks |
|

The following are associated resources for this product. In general users of this product can gain insight into its possible use by utilizing the resources below.
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Preassembled for quick deployment, the solar radiation shield is recommended for temperature and relative humidity measurement accuracy in locations exposed to direct or reflected solar radiation. Mounts on tripods, masts, or flat vertical surfaces. The following loggers require mounting brackets for use with the M-RSA:
- HOBO MX2301 or MX2305 loggers require the MX2300-RS-BRACKET
- HOBO U22 or U23-001 loggers require the U23 Clamp Kit .
The solar radiation shield is recommended for temperature and relative humidity measurement accuracy in locations exposed to direct or reflected solar radiation. Mounts on tripods, masts, or flat vertical surfaces. The RS1 is ideal for use with loggers such as the HOBO MX2300, HOBO Pendant and U-Series data loggers. The following loggers require mounting brackets for use with the RS1:
- HOBO MX2301 or MX2305 loggers require the MX2300-RS-BRACKET
- HOBO U22 or U23-001 loggers require the U23 Clamp Kit .
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Detailed Specifications
HOBO Pendant® MX Temperature/Light Data Logger
Choose measurement system:
Some specifications display both measurement systems and/or refer to other similar products when mentioned.
Temperature Sensor (MX2201 and MX2202) | |
Range | -20° to 70°C in air
(-4° to 158°F in air)
-20° to 50°C in water
(-4° to 122°F in water)
|
Accuracy | ±0.5°C from -20° to 70°C
(±0.5°C from -4° to 158°F)
|
Resolution | 0.04°C
(0.072°F)
|
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
(0 to 15,582 lum/ft2)
|
Accuracy | ±10% typical for direct sunlight (see Light Measurement on page 2 for more details) |
Logger | |
Logger Operating Range | -20° to 70°C in air
(-4° to 158°F in air)
|
Buoyancy (Fresh Water) | 2 g positive
(0.07 oz positive)
|
Waterproof | To 30.5 m
(To 100 ft)
|
Radio Power | 1 mW
(0 dBm)
|
Transmission Range | Approximately 30.5 m line-of-sight
(Approximately 100 ft line-of-sight)
|
Wireless Data Standard | Bluetooth Low Energy (Bluetooth Smart) |
Logging Rate | 1 second to 18 hours |
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 |
Compliance Marks |
|