Kestrel 0801

Every Kestrel hand held weather station features a patented user-replaceable sapphire jewel bearing impeller. They are highly accurate and will take readings as low as 0.3 meters per second.

After excessive wear (approximately 400 hours of use), or use at high speeds, the impeller accuracy may start to drift. This replacement impeller is necessary only when the original impeller is damaged or worn.