| Temperature Sensor |
| Range |
0° to 50°C (32° to 122°F) |
| Accuracy |
±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F) |
| Resolution |
0.024°C at 25°C (0.04°F at 77°F) |
| Drift |
<0.1°C (0.18°F) per year |
| RH Sensor |
| Range |
1% to 90% (non-condensing) |
| Accuracy |
±2% from 20% to 80% typical at 25°C (77°F) |
| Hysteresis |
±2% RH |
| Resolution |
0.01% at 25°C (77°F) |
| Drift |
<1% per year typical |
| CO2 Sensor |
| Range |
0 to 5,000 ppm |
| Accuracy |
±50 ppm ±5% of reading at 25°C (77°F) and 1,013 mbar |
| Warm-up Time |
15 seconds |
| Calibration |
Auto or manual to 400 ppm |
| Non-linearity |
<1% of FS |
| Pressure Dependence |
0.13% of reading per mm Hg (corrected via user input for elevation/altitude) |
| Operating Pressure Range |
950 to 1,050 mbar (use Altitude Compensation for outside of this range) |
| Compensated Pressure Range |
-305 to 5,486 m (-1,000 to 18,000 ft) |
| Sensing Method |
Non-dispersive infrared (NDIR) absorption |
| Response Time |
| Temperature |
12 minutes to 90% in airflow of 1 m/s (2.2 mph) |
| RH |
1 minute to 90% in airflow of 1 m/s (2.2 mph) |
| CO2 |
1 minute to 90% in airflow of 1 m/s (2.2 mph) |
| Logger |
| Radio Power |
1 mW (0 dBm) |
| Transmission Range |
Approximately 30.5 m (100 ft) line-of-sight |
| Wireless Data Standard |
Bluetooth Smart (Bluetooth Low Energy, Bluetooth 4.0) |
| Logger Operating Range |
0° to 50°C (32° to 122°F); 0 to 95% RH (non-condensing) |
| Logging Rate |
1 second to 18 hours |
| Logging Modes |
Fixed interval (normal, statistics) or burst |
| Memory Modes |
Wrap when full or stop when full |
| Start Modes |
Immediate, push button, date & time, or next interval |
| Stop Modes |
When memory full, push button, date & time, or after a set logging period |
| Time Accuracy |
± 1 minute per month at 25°C (77°F) |
| Power Source |
4 AA 1.5 Volt batteries (user replaceable) or USB power source (5 V DC, 2 Watts) |
| Battery Life |
6 months, typical with logging and sampling intervals of 5 minutes or slower; 6 months or less with logging and sampling intervals faster than 5 minutes while logging CO2. Entering burst logging mode will impact battery life. With HOBOmobile use, battery life can be reduced by remaining connected, excessive readouts, checking of Full Status Details, audible alarms, and paging. Visual/audible alarms and other events can have a marginal impact on battery life. |
| Memory |
128 KB (84,650 measurements, maximum) |
| Download Type |
USB 2.0 interface or via Bluetooth Smart |
| Full Memory Download Time |
20 seconds via USB; approximately 60 seconds via Bluetooth Smart, may take longer the further the device is from the logger |
| 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 |
7.62 x 12.95 x 4.78 cm (3.0 x 5.1 x 1.88 inches) |
| Weight |
267.4 g (9.43 oz) |
| Environmental Rating |
IP50 |