HOBO MX2301A Temperature/RH Data Logger



The HOBO MX2301A from Onset is a weatherproof data logger with built-in temperature and relative humidity sensors. Leveraging Bluetooth Low Energy, the logger enables easy, fast set up and data download directly from your mobile device, and provides high-accuracy measurements in harsh outdoor environments.

Applications Include Environmental (Indoor), Environmental (Outdoor), Field Research, Food Safety.

Use the MX2300 Range with the FREE HOBOConnect App.

The MX2300 Range is not supplied with Calibration for Temperature and RH this optional service is available using the Links below for your specific Model. 

Highlighted Features

  • Convenient wireless setup and download via Bluetooth Low Energy (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 HOBOmobile app
  • Share downloaded data easily from your mobile device
  • Accuracy: +/- 0.2C° and +/- 2.5% RH

In what environment does this data logger operate?

This data logger operates in Indoor & outdoor environments.

What measurements does this data logger support?

The MX2301 data logger supports the following measurements: Relative Humidity and Temperature.

Learn more about the MX2300 Series Loggers here

Download Literature

    HOBO MX2301 Temp/RH Bluetooth Data Logger

    HOBO MX2301 Manual

    HOBO MX2301 Quick Setup Guide

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

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 0.04°C (0.072°F)
Drift <0.01°C (0.018°F) per year
RH 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
Memory 128 KB (63,488 measurements, maximum)
Response Time: Temperature (typical, to 90% of change) Without Solar Radiation Shield With RS1/M-RSA Solar Radiation Shield With RS3-B Solar Radiation Shield
internal sensor 17 minutes in air moving 1 m/sec 24 minutes in air moving 1 m/sec N/A
Response Time: RH (typical, to 90% of change) Without Solar Radiation Shield With RS1/M-RSA Solar Radiation Shield With RS3-B Solar Radiation Shield
internal sensor 30 seconds in air moving 1 m/sec 40 seconds in air moving 1 m/sec N/A
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 -40° to 70°C (-40° to 158°F)
Logging Rate 1 second to 18 hours
Logging Modes Fixed interval (normal, statistics) or burst
Memory Modes Wrap when full or stop when full
Start Modes Immediate, push button, date & time, or next interval
Stop Modes When memory full, push button, date & time, or after a set logging period
Time Accuracy ±1 minute per month 0° to 50°C (32° to 122°F)
Battery Type 2/3 AA 3.6 Volt lithium, user replaceable
Battery Life 2 years, typical with logging interval of 1 minute and Power Saving Mode disabled; 5 years, typical with logging interval of 1 minute and Power Saving Mode enabled. Faster logging intervals and statistics sampling intervals, burst logging, remaining connected with the app, excessive downloads, and paging may impact battery life.
Memory 128 KB (63,488 measurements, maximum)
Full Memory Download Time Approximately 60 seconds; may take longer the further the device is from the logger
Dimensions Logger housing: 10.8 x 5.08 x 2.24 cm (4.25 x 2.0 x 0.88 in.)
External temperature sensor diameter: 0.53 cm (0.21 in.)
External temperature/RH sensor diameter: 1.17 cm (0.46 in.)
External sensor cable length: 2 m (6.56 ft)
Solar radiation shield bracket: 10.8 x 8.3 cm (4.25 X 3.25 in.)
Weight Logger: 75.5 g (2.66 oz) Solar radiation shield bracket: 20.4 g (0.72 oz)
Materials Acetal, silicone gasket, stainless steel screws
Environmental Rating NEMA 6 and IP67
CE Compliant 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.

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