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My old AAG anemometer/wind-vane has not got much life left. It really never was suitable for long term exposure to the weather, the plastic case is not waterproof, the bearings need regular replacement, and the plastic itself is almost disintegrating because of exposure to too much UV. So...

I've recently installed one of the new UV sensors. The graph below shows data plotted on 2 min intervals so far today. It is typical. Notice the "spikes" one of two each hour. There is no obvious explanation for this, the sensor is in full sunshine right next to my hobby-boards solar...

I've been having all sorts of problems getting my moisture meter to work reliably. After a lot of mucking around I've finally figured out what is causing the problem, but have no idea how to fix it. With the gypsum sensor in a bucket of water, or in the air, or buried in the soil in a plant...