Weather Station WS-3000
Whether you're an agriculturalist, a professional meteorologist or a weather hobbyist, building your own weather station can be a rewarding project. This kit represents the three core components of weather measurement: wind speed, wind direction and rainfall.
This weather station consists of three different sensors: a wind vane, an anemometer, and a pluviometer. The whole thing connects to your system via six wires — the pluviometer can plug in separately via two wires; the anemometer and wind vane connect as a single unit via four wires, with the two connected together via an RJ11 socket on the vane.
Weather Station Features
The anemometer consists of a normally-open Reed switch that closes for a short period of time when the arms of the anemometer complete a turn, so the output is a digital signal whose frequency will be proportional to the wind speed.
- Sensitivity: 2.4 kph (about 1.5 mph) / turn
- Wind Speed Range: 0 to 240 kph (about 150 mph)
- Height: 7.1 cm (about 2.8 in)
- Arm Length: 8.9 cm (about 3.5 in)
- Interface: RJ11 (plugs into Wind Vane)
The wind vane turns freely on a platform base that has a network of eight resistors connected to normally-open switches that are closed (one or two at a time) when a magnet in the vane acts upon them. This allows you to distinguish up to 16 different positions — hence the resolution of 22.5°. The equivalent resistance of the wind vane, along with a 10kΩ resistance, form a voltage divider which should be powered at 3.3V — e.g., on a Waspmote system, through a digital switch controlled by the ANALOG1 pin whose output can be measured at the analog input ANALOG5.
- Height: 8.9 cm (about 3.5 in)
- Length: 17.8 cm (about 7 in)
- Maximum Accuracy: 22.5°
- Resistance Range: 688Ω to 120kΩ
- Interface: Four wires (for both anemometer and vane)
The pluviometer consists of a small bucket that, once completely filled (0.28mm of water approximately), closes a switch which causes the bucket to empty itself automatically. The repetition of this process results in a digital signal (by monitoring the switch state) whose frequency is proportional to the intensity of rainfall.
- Height: 9.05 cm (about 3.56 in)
- Length: 23 cm (about 9.1 in)
- Bucket Capacity: 0.28 mm (about 0.11 in) of rain
- Interface: Two wires
Comparison View comparison data between this weather station and a more expensive setup of Davis and Rain'o'Matic components.
Compatible with Waspmote This station can be used in a Waspmote wireless sensor platform by plugging it into the Waspmote Agriculture Sensor Board PRO.