HOBO Rain Gauge (Metric) Data Logger

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The Data Logging Rain Gauge is a battery-powered rainfall data collection and recording system which includes a HOBO® Pendant Event data logger integrated into a tipping-bucket rain gauge. This model automatically records up to 3200 mm of rainfall data that 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.

Manufactured by: Onset
Model: HOBO Rain Gauge (Metric) Data Logger

Services offered for this product

  • Sales
  • Rental
  • Installation
  • Calibration
  • Maintenance




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)
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
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
The CE Marking identifies this product as complying with all relevant directives in the European Union (EU).
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%