Deployment Guidelines
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You must mount the rain gauge smart sensor so that it is level. A built-in bubble level is attached to the base to simplify this process.
•
Be sure there is an unobstructed path for water runoff from the drain screens.
•
The sensor contains a magnet-operated switch that may not operate correctly if you mount the rain gauge on or near any object
that is attracted to a magnet.
•
Exposure to winds can reduce the measured rainfall amounts. Mount the sensor where there are no obstructions of rainfall at low
angles (such as trees, houses, fences) and as low as possible out of the wind.
•
If installing the sensor on a sheet metal roof, insulate the unit by making a platform out of wood. Mount the base of the rain gauge at
least 4 cm (1 inch) away from any steel or iron surface and make sure the reed switch is at least 4 cm (1 inch) away from any steel or
iron objects (e.g. nails).
•
For the most accurate rainfall measurements, mount the sensor upslope, about 3 meters (10 feet) away from the tripod, on a 1.5
meter mounting pole (M-MPB). Alternatively, you can mount the sensor on the tripod mast.
•
Tall objects can interfere with accurate rain measurements. It is recommended that you place the rain
bucket away from the obstruction by a distance greater than three times the height of the obstruction.
If that is not possible, raise the rain bucket as high as possible to avoid shedding.
•
Avoid splashing and puddles. Be sure the gauge is high enough above any surface that rain will not
splash into the top of the collector.
•
Secure the sensor cable with cable ties to protect it from damage.
•
Vibration can significantly degrade accuracy of the tipping bucket mechanism. In windy
locations make sure that the bucket will be vibration-free. Consider using the guy wire kit
(M-GWA) to secure a pole or tower-mounted bucket.
•
To provide long-term protection from moisture entry, the smart sensor adapter must be
mounted horizontally and with the cable wires routed with drip loops so that water drains
away from the cable entry point as shown in the example at right. When mounted properly,
the housing is weatherproof (but not waterproof).
For more information about this smart sensor, refer to the full product manual. Scan the code at left or go to
www.onsetcomp.com/support/manuals/s-rgef
.
1-800-LOGGERS (564-4377) • 508-759-9500
www.onsetcomp.com/support/contact
© 2017–2018 Onset Computer Corporation. All rights reserved. Onset and HOBO are registered trademarks of Onset
Computer Corporation. Some material reprinted with permission from Davis Instruments Corporation. Davis is a registered
trademark of Davis Instruments Corporation All other trademarks are the property of their respective companies.
21836-C MAN-S-RGEF-QSG
Drip loop
Drip loop
Smart sensor adapter
mounted horizontally