HOBO U12 Datalogger Family

The HOBO U12 Family data loggers offer combined measurement of temperature, humidity, lux and a range of external sensors

Operation of U12 Family data loggers requires Onset's easy-to-use HOBOware software (Windows or Mac) for logger launch, offload, and data viewing. 



  • 12-bit resolution
  • 43,000 measurements
  • Complete download in 30 seconds via direct USB interface
  • Programmable start time/date or push-button start
  • Data Shuttle for convenient in-field data readout and logger relaunch
  • Operating Range: -20° to 70°C, 5% to 95% RH non-condensing, non-fogging


Measurement Specifications:

  • Temperature - Range: -20° to 70°C; Accuracy: ±0.35°C from 0° to 50°C
  • Humidity - Range: 5% to 95% RH; Accuracy: ±2.5% RH from 10% to 90% typical
  • Light Intensity (U12-013 only) - Range: 1 to 3000 footcandles (lumens/ft2) typical
  • External Input: Range: 0 to 2.5 DC Volts; Accuracy: ±2 mV ±2.5% of absolute reading

External sensors and cables for temperature, CO2, AC Current, AC Voltage, 4-20mA, and DC Voltage.



  • HOBO U12-012 - Temperature, Humidity, Light (lux) & one External Channel
  • HOBO U12-013 - Temperature, Humidity & 2 External Channels
  • Old models:

The models U12-001 (Temp) and U12-011 (Temp/RH) have been superceded by the UX100 range
The model U12-006 4- channel logger has been superceded by the UX120-006M



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Hobo U12 External Sensors Brochure

File Size 369KB   Filename u12_external_sensor_specs_08.pdf   Download

U12 family

File Size 206KB   Filename onset_hobo_u12_data_loggers.pdf   Download

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