Data logger for precise water temperature measurements
Built to last, the HOBO MX2201 temperature logger is compact, waterproof and ideal for measuring temperatures in streams, lakes, oceans and soil. On-site data collection has never been easier! The logger utilizes the power of Bluetooth Low Energy (BLE) to transmit accurate temperature readings directly to your iOS or Android mobile device.
Underwater data loggers of the HOBO MX2200 series
The water temperature loggers of the HOBO MX2200 series allow the user convenient configuration and fast downloads via WLAN for the proven TidbiT and Pendant loggers! These models are equipped with Bluetooth Low Energy (BLE) and deliver highly accurate temperature measurements directly to your iOS or Android mobile device. There is no need for a laptop or waterproof shuttle on site.
Wireless measuring device for water temperature
The HOBO MX2201 data logger measures air temperature and water temperature and is suitable for use in fresh and salt water as well as indoors and outdoors. You can evaluate the recorded water temperatures wirelessly with the free HOBOmobile app. Mounting brackets are available for easy positioning of the logger.
- Recording the water temperature
- Waterproof up to 30 meters
- ±0.5 °C accuracy
- Large memory capacity for 96,000 measured values
- LED display for exceeding limit values
- Replaceable battery
- Set-up and evaluation via Bluetooth Low Energy (BLE)
HOBO MX2201 documentation
Measurement data evaluation with HOBOconnect
The HOBO MX2201 data logger requires the free HOBOconnect app and a compatible mobile device. This allows you to easily configure the wireless data logger. Using the HOBOconnect app, you can easily read out the values and logged temperature data recorded by the sensors of your measuring device.
Configuration and evaluation via web software - MX Gateway
The new MX Gateway automatically collects and transfers the data from your MX Bluetooth data loggers directly to the cloud! With the web-based HOBOlink® software, you can manage your data loggers remotely, set alarm notifications, create customized dashboards, and save time by reducing on-site evaluations. Learn more.Features of the HOBO MX2201 data logger
Technical data
| Measured values | Water temperature |
| Operating range | -20 °C to 50 °C Water temperature |
| Buoyancy (fresh water) | 2 g positive |
| Watertight | up to 30.5 m |
| Radio power | 1 mW |
| Transmission range | approx. 30.5 m |
| Wireless data standard | Bluetooth Low Energy |
| Storage interval | 1 second to 18 hours |
| Time accuracy | ±1 minute per month at 25 °C |
| Battery | CR2032, 3 V lithium battery, replaceable by user |
| Battery life | 1 year at 25 °C with a storage interval of 1 minute and activated Bluetooth 2 years at 25 °C with a storage interval of 1 minute and Bluetooth deactivated Shorter storage and measurement intervals can affect battery life. |
| Memory | 96,000 measurements |
| Memory download time | approx. 45 seconds |
| Materials | Polypropylene housing, EPDM O-ring |
| Dimensions | 3.35 x 5.64 x 1.6 cm |
| Weight | 12,75 g |
| Protection class | IP68 |
| For more detailed product specifications, please read the user manual | |
Temperature sensor
| Temperature range | -20 °C to 70 °C in air -20 °C to 50 °C in water |
| Accuracy |
±0.5 °C at -20 °C to 70 °C |
| Resolution |
0,04 °C |
| Drift | <0.1 °C per year |
| Response time | 17 minutes, typically up to 90 % in air flow of 1 m/s, unmounted 7 minutes, typically up to 90 % in stirred water, unmounted |