I've had the
Kaindl for years -- used it to evaluate my property for wind power. It logs average & max winds for about a week before going to sleep; batteries lasted nearly a year, always on. Tough little beastie -- it logged winds up to 119 MPH! And survived Wyoming's cold and sun on top a pole for two years, before the whirlygig shaft wore out its plastic bearings.
It's omnidirectional, which is nice; it has a 1/4"/20 tripod mount on bottom. Reads kmh, mph, kts, m/s, and Beaufort.
AFAIK, the link above is the only US distributor. I got mine years ago from a dude in Quebec. Paid $65 on eBay.