Whether you're an agriculturalist, a professional meteorologist or a weather hobbyist, building your own weather station can be a really rewarding project.
When you're measuring weather, however, you need some pretty specialized sensors. This kit represents the three core components of weather measurement: wind speed, wind direction and rainfall.
None of the sensors in this kit contain active electronics, instead they use sealed magnetic reed switches and magnets so you'll need to source a voltage to take any measurements.
The positive side of this is that the sensors are easy to interpret:
The rain gauge is a self-emptying bucket-type rain gauge which activates a momentary button closure for each 0.28mm; of rain that are collected.
The anemometer (wind speed meter) encodes the wind speed by simply closing a switch which each rotation.
A wind speed of 1.492 MPH produces a switch closure once per second. Finally, the wind vane reports wind direction as a voltage which is produced by the combination of resistors inside the sensor.
When a voltage is supplied, the voltage returned can be translated to any of 16 possible positions.
For more information on how this works, as well as a table of voltage and resistance values for each position, refer to the manual below.
All of the included sensors are supplied with RJ11 terminated cables, for information on the pin-out of the cable, check out the datasheet.
Note: Some basic assembly is required.