On 11/02/2016 16:20, JohnD wrote:
"Freddie" wrote in message ...

John, what is the expected lifetime of VP2 anemometer bearings?

If I had to estimate, I'd suggest eg 5 years at an average
inland/lowland location. Coastal locations are typically going to be
windier and have at least some salt spray in the air. Actually the 6410
anemometer design was revised some 2-3 years ago, in part with new
lower-friction bearings (for enhanced responsiveness at low wind speeds)
and TBH there hasn't been enough field experience with the new design to
get a real idea of whether expected longevity is any different. But I'd
hope that at least 5 years was going to be the benchmark again.

JGD
Just get a Dines Pressure Tube Anemograph! I'm sure the output could be
digitised by some clever script kiddy!

Ah well, maybe not - there would be a lot of kit to be incorporated.
Does anyone know if any are still in use?