| General Specifications |
| Temperature Sensor |
| Range |
-20° to 70°C (-4° to 158°F) |
| Accuracy |
±0.21°C from 0° to 50°C (±0.38°F from 32° to 122°F), see Plot A |
| Resolution |
0.024°C at 25°C (0.04°F at 77°F); see Plot A |
| Response time |
4 minutes in air moving 1 m/s (2.2 mph) |
| Drift |
<0.1°C (0.18°F) per year |
| RH Sensor |
| Range |
1% to 95% (non-condensing) |
| Accuracy |
±2.5% from 10% to 90% typical to a maximum of ±3.5% including hysteresis at 25°C (77°F); below 10% and
above 90% ±5% typical |
| Resolution |
0.01% |
| Response time |
10 seconds to 90% in airflow of 1 m/s (2.2 mph) |
| Drift |
<1% per year typical |
| 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 |
Normal, Burst or Statistics |
| Memory modes |
Wrap when Full or Stop when Full |
| Start modes |
Immediately, Push Button, Date & Time or Next Interval |
| Stop modes |
When Memory Full, Push Button, or Date & Time |
| Restart mode |
Push Button |
| Time accuracy |
±1 minute per month at 25°C (77°F), see Plot C |
| Battery life |
1 year, typical with logging rate of 1 minute and sampling interval of 15 seconds or greater |
| Battery type |
One 3V CR2032 lithium battery |
| Memory |
128 KB (63,488 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 2.29 cm (1.44 x 3.34 x 0.9 in.) |
| Weight |
30 g (1.06 oz) |
| Environmental rating |
IP50 |