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The HOBO MX2201 water temperature logger leverages the power of Bluetooth Low Energy (BLE) to deliver accurate temperature measurements straight to your iOS or Android mobile device. Designed for durability, this compact waterproof logger is ideal for measuring temperature in streams, lakes, oceans, and soil environments. Data collection in the field has never been easier!
This data logger operates in indoor, outdoor and underwater environments.
The MX2201 data logger supports the following measurements: Temperature and Water Temp
The HOBO MX2204 data logger requires the HOBOmobile App and a compatible mobile device. The system requirements for the HOBOmobile app can be found at the bottom of our HOBOmobile software page.
To see the full specifications for this product, please see our product manual found in the PDF documents above.
-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)
<0.1°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
0 to 167,731 lux (15,582 lum/ft2)
±10% typical for direct sunlight (see Light Measurement on page 2 for more details)
1 mW (0 dBm)
Approximately 30.5 m (100 ft) line-of-sight
Wireless Data Standard
Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)
Logger Operating Range
1 second to 18 hours
Buoyancy (Fresh Water)
2g (0.07 oz) positive
To 30.5 m (100 ft)
CR2032 3V lithium, user replaceable
1 year typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off disabled in software.
2 years typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off enabled 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.
± 1 minute per month at 25°C (77°F)
Full Memory Dowload
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 1.6 cm (1.32 x 2.22 x 0.63 inches)
12.75 g (.45 oz)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU). This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to Part 15 of the FCC Rules.