HOBO Temperature/Relative Humidity 3.5% Data Logger

Specifications

Temperature Sensor

Range: -20° to 70°C (-4° to 158°F)
Accuracy: ±0.21°C from 0° to 50°C , see manual for plot (±0.38°F from 32° to 122°F , see manual for plot)
Resolution: 0.024°C at 25°C , see manual for plot (0.04°F at 77°F , see manual for plot)
Response Time: 4 minutes in air moving 1 m/s (2.2 mph)
Drift: <0.1°C per year (0.18°F per year)

RH Sensor

Range: 15% to 95% (non-condensing)
Accuracy: ±3.5% from 25% to 85% including hysteresis at 25°C (77°F); below 25% and above 85% ±5% typical
Resolution: 0.07% at 25°C (77°F) and 30% RH
Response Time: 43 seconds to 90% in airflow of 1 m/s (2.2 mph)
Drift: <1% per year, typical

Logger

Logger Operating Range
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)
Logging Rate: 1 second to 18 hours, 12 minutes, 15 seconds
Logging Modes: Fixed interval (normal), burst, or statistics
Memory Modes: Wrap when full or stop when full
Start Modes: Immediate, push button, date & time, or next interval
Stop Modes: When memory is full, push button, or date & time
Restart Mode: Push button
Time Accuracy: ±1 minute per month at 25°C (77°F)
Power Source: One 3V CR2032 lithium battery and USB cable
Battery Life: 1 year, typical with a logging rate of 1 minute and a sampling interval of 15 seconds or greater
Memory: 128 KB (84,650 measurements, maximum)
Download Type: USB 2.0 interface
Full Memory Download Time: 20 seconds
LCD: LCD is visible from 0° to 50°C (32° to 122°F); the LCD may react slowly or go blank in temperatures outside this range
Size: 3.66 x 8.48 x 1.52 cm (1.44 x 3.34 x 0.6 in.)