The PWSMini is designed by Dr. Sten L�¶fving is a spin off from our MiniOFS sensor and it is probably the cheapest Present Weather Sensor on the market. And it is very compact - the width is only 68 mm. This little sensor measures 3 important weather parameters. (1) Visibility (2) Rain - the response is fast compared to that from a tipping bucket. The threshold is also lower. (3) Snow - same as for rain - note that a simple tipping bucket sensor does not detect snow in many cases. Besides that two other weather parameters are measured and displayed: Ambient light - the resolution and accuracy is not as good as for special sensors like solarimeters but the information is useful for giving answers to questions like telling if it is cloudy or not or of course if night or day. Temperature - the temp. sensor is located inside the sensor body and the accuracy is therefore not better than about 2 deg C. (But this is in some cases good enough - trends can be seen etc.)
