Product Description
Onset U12-012 HOBO Temp/RH/Light External Data Logger
Features:
- 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
Measurement Range:
- Temperature: -20° to 70°C (-4° to 158°F)
- RH: 5% to 95% RH
- Light intensity: 1 to 3000 foot candles (lumens/ft2) typical; maximum value varies from 1500 to 4500 foot candles (lumens/ft2)
- Analog channels: 0 to 2.5 Vdc (w/CABLE-2.5-STEREO); 0 to 5 Vdc (w/CABLE-ADAP5); 0 to 10 Vdc (w/ CABLE-ADAP10); 4-20 mA (w/CABLE-4-20MA)
Accuracy:
- Temperature: ± 0.35°C from 0° to 50°C (± 0.63°F from 32° to 122°F), see Plot A in manual
- RH: ± 2.5% from 10% to 90% RH typical, to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and above 90% ±5% typical, see Plot B in manual
- Light intensity: Designed for indoor measurement of relative light levels, see Plot D in manual for light wavelength response
- External input channel (see sensor manual): ± 2 mV ± 2.5% of absolute reading
Resolution:
- Temperature: 0.03°C at 25°C (0.05°F at 77°F), see Plot A in manual
- RH: 0.05% RH
Sample rate: 1 second to 18 hours, user selectable
Drift:
- Temperature: 0.1°C/year (0.2°F/year)
- RH: <1% per year typical; RH hysteresis 1%
Response Time in Airflow of 1 m/s (2.2 mph):
- Temperature: 6 minutes, typical to 90%
- RH: 1 minute, typical to 90%
Time accuracy: ± 1 minute per month at 25°C (77°F), see Plot C in manual
Operating Temperature:
- Logging: -20° to 70°C (-4° to 158°F); 0 to 95% RH (non-condensing)
- Launch/readout: 0° to 50°C (32° to 122°F), per USB specification
