Part Number - RG3

HOBO Rain Gauge Data Logger

US version (includes data logger)

$530.00 USD
A battery-powered rainfall data collection and recording system that includes a HOBO Pendant Event data logger integrated into a tipping-bucket rain gauge.

Important Information

Requires HOBOware software (USB interface cable included w/CD purchase) and a communications device. See compatible items below.

Compatible with


A battery-powered rainfall data collection and recording system that includes a  HOBO Pendant Event data logger integrated into a tipping-bucket rain gauge. This model automatically records up to 160 inches of rainfall at rates up to 12.7 cm (5 in) per hour. Easily collect rainfall, time, and duration data, as well as temperature when used with an optional solar radiation shield (RS1 Solar Radiation Shield or M-RSA). A base station or shuttle is required.


RG3 external Pendant logger mounting diagram





  • 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


Rain Gauge

Maximum Rainfall Rate
12.7 cm per hour
5 in. per hour
Calibration Accuracy
±1.0% (up to 1 in. per hour)
0.01 in.
Requires annual field calibration, see Field Calibration section in manual
Operating Temperature Range
0° to 50°C
32° to 122°F
Storage Temperature Range
-20° to 70°C
-4° to 158°F
Environmental Rating
15.24 cm aluminum collector and base
6 in. aluminum collector and base
Tipping-bucket Mechanism
Stainless steel shaft with brass bearings
25.72 cm height x 15.24 cm diameter
10.125 in. height x 6 in. diameter
15.39 cm receiving orifice
6.06 in. receiving orifice
1.2 Kg
2.5 lbs


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 (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)
CR-2032 3V lithium battery; 1 year typical use
64K bytes – 16K to 23K when recording events only; 25K to 30K data points when recording events and temperature; see Data Storage.
Polypropylene case; stainless steel screws; Buna-N O-ring; PVC cable insulation

Temperature Measurement (see Using the Logger for Temperature Measurement section)

Measurement Range
-20° to 70°C
-4° to 158°F
±0.54°C from 0° to 50°C (± 0.97°F from 32° to 122°F), see manual for plot. A solar radiation shield is required for accurate temperature measurements in sunlight.
0.10°C at 25°C , see manual for plot
0.18°F at 77°F , see manual for plot
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%
CE Compliance Mark

Compatible items

Data Offload - Base Stations - Shuttles - Couplers

$15.00 USD

Compliance Certificates

$30.00 USD


$13.00 USD


$12.00 USD

Data Offload - Base Stations - Shuttles - Couplers

$175.00 USD
$325.00 USD

Graphing & Analysis

$75.00 USD
$99.00 USD

What's in the box

  • Tipping-bucket rainfall collector
  • HOBO Pendant Event Logger
  • Mounting accessories: two hose clamps, three screws


Data Logging Rain Gauge (RG3, RG3-M) User's Manual

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