Overview
A battery-powered rainfall data collection and recording system that includes a HOBO Pendant Event data logger integrated into a tipping-bucket rain gauge. Automatically records up to 3200 mm (160 inches) of rainfall data at rates up to 12.7 cm (5 in) per hour, which can be used to determine rainfall rates, times, and duration. Also records temperature when used with an optional solar radiation shield (RS1 Solar Radiation Shield or M-RSA). A base station or shuttle is required.
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Features
- High quality tipping-bucket rain gauge includes a HOBO Pendant Event data logger. Base station or shuttle is required
- Time and date stamp is stored for each tip – provides detail needed to determine rainfall rates and duration
- Reliable, field-proven rain gauge
- Compatible with HOBOware and HOBOware Pro software for logger setup, graphing, and analysis
- Also records temperature when used with an optional solar radiation shield
Specifications
Rain Gauge
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
15.24cm (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), see Plot B on page 10.
Operating range
-20° to 70°C
-4° to 158°F
Environmental rating (for logger used outside of rain gauge)
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%
