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

Features:

• 12-bit resolution
• 43,000 measurements
• Complete download in 30 seconds via direct USB interface
• Programmable start time/date or push-button start
• Programmable sampling rate (1 second to 18 hours)
• Battery level can be recorded as a separate channel
• 1-year battery life (typical)user-replaceable CR-2032 lithium battery
• Non-volatile memory retains data even if battery fails
• Data Shuttle for convenient in-field data readout and logger relaunch
• NIST-traceable temperature accuracy certification available
• Operating Range: -20° to 70°C, 5% to 95% RH non-condensing, non-fogging

Internal Temperature (models U12-001, U12-011, U12-012, U12-013)

• Measurement Range: -20° to 70°C
• Accuracy: ±0.35°C from 0° to 50°C

External Inputs (models U12-006, U12-012, U12-013)

• External Input Channel Measurement 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.

Humidity (models U12-011, U12-012, U12-013)

• Relative Humidity Measurement Range: 5% to 95% RH
  
• Accuracy: ±2.5% RH from 10% to 90% typical

Light Intensity (models U12-012, U12-013)

• Measurement Range (internal sensor): 1 to 3000 footcandles (lumens/ft2) typical

Models:

• HOBO U12-001 - Temperature
• HOBO U12-006 - 4 External Channels
• HOBO U12-011 - Temperature & Humidity
• HOBO U12-012 - Temperature, Humidity, Light (lux) & one External Channel
• HOBO U12-013 - Temperature, Humidity & 2 External Channels