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Data Loggers

HOBO U12 Temperature/Relative Humidity/2 External Channel Data Logger - U12-013

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IMPORTANT: This HOBO data logger requires HOBOware software and a communications device. See compatible items below.

The HOBO U12-013 data logger has a built in temperature and relative humidity sensor along with 2 external channels for a wide range of energyand environmental sensors. This product can store up to 43,000 measurements of 12-bit resolution readings.

  • 12-bit resolution provides high accuracy

  • Large memory for long-term deployments or fast sampling

  • Programmable and push button start

  • Direct USB interface for fast data offload

  • Compatible with Onset’s HOBO U-Shuttle for convenient data transport

  • Compatible with HOBOware and HOBOware Pro for logger setup, graphing and analysis


The U12-013 Data Logger is for use in Indoor environments

The U12-013 Data Logger supports the following measurements (some sensors sold separately):


AC Current
Relative Humidity
DC Voltage
AC Voltage
Carbon Dioxide


Measurement range:
Temperature: -20° to 70°C (-4° to 158°F) 
RH: 5% to 95% RH
External input channel (see sensor manual): 0 to 2.5 DC Volts
Temperature: ± 0.35°C from 0° to 50°C (± 0.63°F from 32° to 122°F), see Plot A 
RH: ±2.5% from 10% to 90% RH (typical), to a maximum of ±3.5%, see Plot B
External input channel (see sensor manual): ± 2 mV ± 2.5% of absolute reading
Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A 
RH: 0.03% RH
Drift: Temperature: 0.1°C/year (0.2°F/year)
RH: <1% per year typical; RH hysteresis 1%
Time accuracy:
± 1 minute per month at 25°C (77°F), see Plot C 
Response time in airflow of 1 m/s (2.2 mph)
Temperature: 6 minutes, typical to 90%
RH: 1 minute, typical to 90%
Operating temperature:
Logging: -20° to 70°C (-4° to 158°F)
Launch/readout: 0° to 50°C (32° to 122°F), per USB specification
Battery life:1 year typical use
Memory:64K bytes (43,000 12-bit measurements)
Weight:46 g (1.6 oz)
Dimensions:58 x 74 x 22 mm (2.3 x 2.9 x 0.9 inches)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).

Producing Area:USA

Temperature, Relative Humidity, 4-20mA, AC Current, AC Voltage, Air Velocity , Carbon Dioxide, Compressed Air Flow, DC Current, DC Voltage, Gauge Pressure, Kilowatts (kW), Volatile Organic Compound

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