SparkFun
Cup Anemometer with RJ11 Connector
· MPN: SEN-28869
This anemometer measures wind speed using rotating cups that turn an enclosed magnet. On each rotation, the magnet closes a reed switch, producing a simple p...
This anemometer measures wind speed using rotating cups that turn an enclosed magnet. On each rotation, the magnet closes a reed switch, producing a simple pulse output that can be counted by your electronics.
The output is available on the two inner conductors of the RJ11 connector, pins 2 and 3. Connect it to a digital counter or to interrupt-capable pins on a microcontroller to measure switch closures over time.
To convert the pulse rate into wind speed, use the supplied conversion of 1 switch closure per second equals 1.492 mph, or 2.4 km/h.
This is the same anemometer used with the SparkFun Weather Meter Kit, making it suitable for weather station builds, environmental monitoring and maker projects.
Specifications:
- Measurement: Wind speed
- Sensor mechanism: Rotating cups with enclosed magnet and reed switch
- Connector: RJ11
- Output conductors: Two inner conductors of the RJ11 connector
- Output pins: Pins 2 and 3
- Output type: Reed switch closure on each rotation
- Interface: Digital counter or interrupt pins on a microcontroller
- Conversion: 1.492 mph = 1 switch closure/second
- Metric conversion: 2.4 km/h = 1 switch closure/second
- Weather Meter Kit: Same anemometer used with the Weather Meter Kit
Jargon buster
Plain-language definitions for the technical terms used above.
- microcontroller
- A microcontroller is a small computer on a chip that runs your program and controls connected inputs and outputs. For this product, it is the part that reads buttons and sensors, drives the display and speaker, and communicates over Bluetooth.
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Sensors & Input
Cup Anemometer Mechanical Drawing
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Supplier page — sparkfun.com
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