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HOBO MX2204 Bluetooth Temperature Data Logger

Brand: Onset HOBO
Product Code: MX2204
HOBO MX2204 Bluetooth Temperature Data Logger
Ex VAT £163.09 Inc VAT £195.71

Availability: In stock

SKU: MX2204

Product Description


The HOBO MX2204 TidbiT waterproof temperature logger leverages the power of Bluetooth Low Energy (BLE) to deliver high-accuracy temperature measurements straight to your iOS or Android mobile device. Designed for durability, this rugged waterproof logger is ideal for long-term deployments in streams, lakes, and oceans. Data collection in the field has never been easier!

Highlighted Features

  • Convenient wireless setup and download via Bluetooth Low Energy (BLE)

  • Large memory stores 96,000 measurements

  • Waterproof to 1500 meters (5,000 feet)

  • Waterproof boot protects the logger during deployment

  • LED alarm notifies you when temperature exceeds set threshold

  • Water detection feature conserves battery life

  • Works with Onset’s free HOBOmobile app

  • ±0.2°C (±0.36°F) accuracy

In what environment does this data logger operate?

This data logger operates in indoor, outdoor and underwater environments.

What measurements does this data logger support?

The MX2204 data logger supports the following measurements: Temperature and Water Temp


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Ex VAT £163.09 Inc VAT £195.71
Additional Information

Additional Information



Temperature Sensor (MX2204)


MX2204: -20° to 70°C (-4° to 158°F) in air; -20° to 50°C (-4° to 122°F) in water, maximum sustained temperature in water 30°C (86°F)


±0.25°C from -20° to 0°C (±.45°F from -4° to 32°F)

±0.2°C from 0° to 70°C (±0.36°F from 32° to 158°F)


0.01°C (0.018°F)


<0.1°C (0.18°F) per year

Response Time

MX2204: 15 minutes typical to 90% in air moving 1 m/s, unmounted;

4 minutes typical to 90% in stirred water, unmounted



Radio Power

1 mW (0 dBm)

Transmission Range

Approximately 30.5 m (100 ft) line-of-sight

Wireless Data Standard

Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0)

Logger Operating Range

-20° to 70°C (-4° to 158°F)

Logging Rate

1 second to 18 hours

Buoyancy (Fresh Water)

MX2204: 7.6 g (0.27 oz) negative


MX2204: To 1,524 m (5,000 ft)

Water Detection

Water conductivity level of 100 µS/cm or greater necessary for reliable detection of water. Deionized water or water below 100 µS/cm may not be detected.

The water conductivity circuit may not reliably detect water that has frozen around the electrodes, i.e. below 0°C (32°F).


96,000 measurements


CR2477 3V lithium, non-replaceable in MX2204

Battery Life

3 years, typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off disabled in software.

5 years, typical at 25°C (77°F) with logging interval of 1 minute and Bluetooth Always Off or Bluetooth Off Water Detect 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.

Time Accuracy

± 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

Wetted Materials

MX2204: Epoxy case, Santoprene (TPE) boot


MX2204: 4.06 x 6.99 x 3.51 cm (1.6 x 2.75 x 1.38 inches)


MX2204: 32.8 g (1.16 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.

Contents Data Logger Protective Boot
Country of Manufacture United States
Onset Product Series TidbiT
Typical Applications Environmental (Outdoor), Food Safety, Water Quality
Data Available By Bluetooth, Wireless
Measurements Temperature, Water Temperature

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