U12-013

The HOBO U12 Temp/RH/2 External Logger contains internal sensors for monitoring two common indoor parameters. Two external channels accept a wide range of external sensors, including temperature, AC current, AC voltage, CO2, 4-20mA, and DC voltage cables.

• 12-bit resolution provides high accuracy
• Large memory for long-term deployments or fast sampling
• Five models to choose from, with flexible measurement options
• Programmable and push button start

Environment: Indoor Measurement: AC Current Temperature Relative Humidity DC Voltage 4-20mA AC Voltage Carbon Dioxide		Product ID: U12-013 Product Name: Temperature/RH/2 External Channel Product Type: Data Loggers

Measurement range:
Temperature: -20° to 70°C (-4° to 158°F)
RH: 5% to 95% RH
External input channels (see sensor manual): 0 to 2.5 DC Volts

Accuracy:
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%, see Plot B; conditions above 80% RH and 60°C (140°F) may cause additional error
External input channels (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
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).

Plot A	Plot B
Plot C