HOBO Rain Gauge Data Logger
Specification
Rain Gauge Specifications
| Maximum Rainfall Rate |
12.7 cm (5 in.) per hour |
| Calibration Accuracy |
±1.0% up to 1 in./hour for the RG3 or 20 mm/hour for the RG3-M |
| Resolution |
0.01 in. (RG3) or 0.2 mm (RG3-M) |
| Calibration |
Requires annual calibration: can be field calibrated or returned to the factory for re-calibration |
| Operating Temperature Range |
0° to +50°C / +32° to +122°F |
| Storage Temperature Range |
-20° to +70°C / -4° to +158°F |
| Environmental Rating |
Weatherproof |
| Housing |
15.24 cm (6-in.) aluminum bucket |
| Tipping Bucket Mechanism |
Stainless steel shaft with brass bearings |
| Dimensions |
25.72 cm height x 15.24 cm diameter (10.125 x 6 in.); 15.39 cm (6.06 in.) receiving orifice |
| Weight |
1.2 Kg / 2.5 lbs |
| Part Numbers |
RG3 (0.01 in. per tip), RG3-M (0.2 mm per tip) |
Logger
| Time Stamp Resolution |
1.0 second |
| Time Accuracy |
± 1 minute per month at 25°C (77°F) |
| Operating Range |
-20° to 70°C / -4° to 158°F |
| Environmental Rating |
Tested to NEMA 6 and IP67; suitable for deployment outdoors |
| NIST Traceable Certification |
Available for temperature only at additional charge; temperature range -20° to 70°C / -4° to 158°F |
| Battery |
CR-2032 3V lithium battery; 1 year typical use |
| Memory |
64K bytes – 16K to 23K tips when recording rain only; 25K to 30K data points when recording rain and temperature |
| Materials |
Polypropylene case; stainless steel screws; Buna-N o-ring; PVC cable insulation |
Temperature Measurement
| Measurement Range |
-20° to 70°C / -4° to 158°F |
| Accuracy |
± 0.47°C at 25°C (± 0.85°F at 77°F), A solar radiation shield is required for accurate temperature measurements in sunlight |
| Resolution |
0.10°C at 25°C / 0.18°F at 77°F |
| Drift |
Less than 0.1°C/year / 0.2°F/year |
| Response Time |
Airflow of 1 m/s (2.2 mph): 10 minutes, typical to 90% |
