I just received the GM8901 today. meter and turbine sensor were professionally packaged separately in bubbles embedded in a box put in a bubbled envelope. They arrived in perfect, shiny condition, within the max time indicated by AliExpress. The anemometer operation is fine. The keys work great with a clear click. The manual is very clear. The temperature resolution amounts to 0.1 oC, better than the 0.2 mentioned in the specs. The temperature accuracy is within the specified range of 2 oC. The sensor turbine reacts immediately on air speed changes. It has surprisingly low flywheel effect, which is good. I expect, on the basis of some measurements up to 10 m.s-1, that the calibration I do next week will be fine. I thank DZY instrument Store for a great anemometer with an attractive price, and the excellent packaging and delivery as promised.
I just received the GM8901 today. meter and turbine sensor were professionally packaged separately in bubbles embedded in a box put in a bubbled envelope. They arrived in perfect, shiny condition, within the max time indicated by AliExpress. The anemometer operation is fine. The keys work great with a clear click. The manual is very clear. The temperature resolution amounts to 0.1 oC, better than the 0.2 mentioned in the specs. The temperature accuracy is within the specified range of 2 oC. The sensor turbine reacts immediately on air speed changes. It has surprisingly low flywheel effect, which is good. I expect, on the basis of some measurements up to 10 m.s-1, that the calibration I do next week will be fine. I thank DZY instrument Store for a great anemometer with an attractive price, and the excellent packaging and delivery as promised.