RK400-01 Tipping Bucket Rainfall Sensor
www.rikasensor.com
The RK400-01 Tipping Bucket Rainfall Sensor is an instrument for testing rainfall in the nature. In order to
meet the requirement of information transmission, processing, recording and display, the amount of rainfall is
converted to pulse output. It can be widely used in weather stations, hydrometric stations, agriculture &
forestry, defense & field monitoring stations. It can provide the original data for flood-prevention, water-supply
system, and reservoir water management in plant.
FEATURES
⚫ Compact size for easy use
⚫ High accuracy, good stability
⚫ Mesh in the funnel preventing debris such as
leaves and insects from entering the working of
rain sensor(mesh is optional)
⚫ Well made tipping bucket with low resistance
⚫ Highly polished stainless steel construction
⚫ Horizontal Bubble in the bottom
⚫ Rain collector with filter, to prevent the leaves, such
as debris jam over the hole
⚫ Optional heating function in cold region
APPLICATIONS
⚫ Water supply system
⚫ Hydrologic monitoring
⚫ Natural disaster monitoring
⚫ Agro-meteorological research
⚫ Climate research
SPECIFICATIONS
Item Specification
Rainfall collector Diameter :φ200mm, height: 350mm
Measured rainfall intensity Max: 4mm/min
Allow rainfall intensity Max: 10mm/min
Resolution 0.1mm, 0.2mm
Accuracy(2mm/min) ±4%
Maximum load voltage 30VDC(pulse output)
Maximum load current 20mA(pulse output)
Output Reed switch pulses,RS485(12-24VDC supply)
Operating temperature(no freeze) -20-+80℃
Main material Collector:304SS,tipping bucket:ABS
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RK400-01 Tipping Bucket Rainfall Sensor
www.rikasensor.com
Tipping bucket Single
Heating power: approx.350W
Heating(optional) Heating voltage:220VAC
Collector filter Removable filter (prevent leaves and sundries)optional
Weight(unpacked) 3.5kg
According to user requirements,set heating start point and heated end point before leaving the factory.
WORKING PROCESS
Rainfall is captured in the 200mm diameter
collector funnel and is directed through a delivery
pipe to fill a divided ABS injection molded tipping
bucket device.The bucket is pivoted through its
center and has a preset calibration to tip for 0.2
mm of rainfall. When the bucket is “full”, it pivots
and empties - this action magnetically closes and
opens a reed switch, sending a pulse signal to
the data logger or electronic counter. Through
this tipping “seesaw” action, the other side of the
bucket is aligned to receive the flow from the
delivery pipe. This recording and tipping cycle
continues with rainfall.
DIMENSION
Unit:mm
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RK400-01 Tipping Bucket Rainfall Sensor
www.rikasensor.com
PARAMETER SELECTION TABLE
Remark Series Type Output Resolution Heating Filter Cable
Length
RK
400
01
A Pulse(Reed switch)
B RS485
C Customization
A 0.2mm(default)
X Other
A Without heating
B With heating(independent
cable)
A Without filter
B With filter
1500 Units:mm（typ.）
3000 Units:mm
... Units:mm
Example: RK400-01AAAA1500 Output:pulse, Resolution:0.2mm, Without heating,Without filter, Cable Length:1.5m.
Appendix:
Rainfall intensity scale
Scale 24-hour rainfall(mm)
Light rain 1-9.9
Moderate rain 10-24.9
Heavy rain 25-49.9
Rainstorm 50-99.9
Torrential rain 100-200
Super-Torrential rain >200
Complies with applicable CE directives.
Specifications subject to change without notice. Version 3.0
Copyright © 2015 Hunan Rika Electronic Tech Co.,Ltd
Hunan Rika Electronic Tech Co., Ltd +86-731-85132979
Add: Building B5, Taskin, Yuhua District,
info@rikasensor.com
Changsha City, Hunan Province,
www.rikasensor.com
China
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