HOBO Temperature Data Logger

Temperature Logger With Internal Sensor

The MX2305 is a weatherproof data logger with an internal temperature sensor. Leveraging Bluetooth technology for easy setup and data download directly to your mobile device or Windows computer running Onset's free HOBOconnect app, this logger delivers high-accuracy measurements in harsh outdoor environments.

HOBO MX2300 loggers provide a 100' wireless range, making it simple to offload data in hard-to-reach locations. And 0.2C accuracy ensures you're getting reliable, true results every time.

From environmental research to crop management, HOBO MX2300 loggers are a low-cost, accurate monitoring solution to help you improve crop yield and quality, reduce erosion and harmful runoff, better understand the impacts of climate change, enhance irrigation, and more!

What's in the box?

• HOBO MX2303 External Temp Data Logger
• Screws
• Cable ties

Features & Benefits

• Convenient wireless setup and download via Bluetooth (100-foot range)
• Retrieve data in hard-to-reach locations
• Visual alarms alert you to out-of-range conditions
• Compact, weatherproof housing with built-in mounting
• View current data in real-time with Onset’s free HOBOconnect app
• Share downloaded data easily from your mobile device
• Accuracy: +/- 0.2C°

In what environment does this data logger operate?

This data logger operates in indoor and outdoor environments.

The MX2303 data logger supports the following measurements: Temperature

Specifications for the MX2305

Temperature Sensor

• Range:
  • MX2301A and MX2305 internal sensors: -40 to 70°C (-40 to 158°F)
  • MX2302A external temperature sensor: -40 to 70°C (-40 to 158°F)
  • MX2303 and MX2304 external sensors: -40 to 100°C (-40 to 212°F), with tip and cable immersion in fresh water up to 50°C (122°F) for one year
• Accuracy:
  • ±0.25°C from -40 to 0°C (±0.45 from -40 to 32°F)
  • ±0.2°C from 0 to 70°C (±0.36 from 32 to 158°F)
  • ±0.25°C from 70 to 100°C (±0.45 from 158 to 212°F), MX2303 and MX2304 only
• Resolution:
  • MX2301A and MX2302A: 0.02°C (0.036°F)
  • MX2303, MX2304, and MX2305: 0.04°C (0.072°F)
• Drift: <0.01°C (0.018°F) per year

Relative Humidity Sensor (MX2301A, MX2302A only)

• Range: 0 to 100% RH, -40° to 70°C (-40° to 158°F); exposure to conditions below -20°C (-4°F) or above 95% RH may temporarily increase the maximum RH sensor error by an additional 1%
• Accuracy: ±2.5% from 10% to 90% (typical) to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% RH and above 90% RH ±5% typical
• Resolution: 0.01%
• Drift: <1% per year typical