# Anemometer

**Type:** Product page · **SKU:** SEN-28869 · **Brand:** [Sparkfun](https://core-electronics.com.au/brands/sparkfun-australia)
**Page:** https://core-electronics.com.au/sparkfun-anemometer-wind-speed-sensor.html ([markdown](https://core-electronics.com.au/sparkfun-anemometer-wind-speed-sensor.html.md))

An anemometer measures wind speed. The wind moves the cups on the anemometer, which rotates an enclosed magnet. The magnet closes a reed switch on each...

## Pricing

- **Price:** $22.70 (inc GST) — $20.64 AUD, exc GST
- **Quantity discounts:** 5+ $20.02 (exc GST) · 25+ $19.60 (exc GST) · 100+ $18.78 (exc GST)

## Availability & dispatch

- Out of stock — the product page offers email notification when it returns.

## Description

An anemometer measures wind speed. The wind moves the cups on the anemometer, which rotates an enclosed magnet. The magnet closes a reed switch on each rotation, which is reflected on the output. You can measure this on the two inner conductors of the RJ11 connector (pins 2 and 3), using a digital counter or interrupt pins on your microcontroller. To convert this into a functional wind speed, use the conversion of 1.492 mph = 1 switch closure/second. For those in metric land, this is 2.4 km/h.

This is the same anemometer that is used with the [Weather Meter Kit](https://core-electronics.com.au/weather-meter-kit.html).

## Images

- [Product image 1](https://core-electronics.com.au/media/catalog/product/S/E/SEN-28869-1.jpg)