CUP STYLE  ANENOMETER  LUTRON TIWAN  AM-4220

    High Reliability Measurement: Designed for outdoor wind speed measurement
    Wide Measurement Range: Measures wind speed from 0.9 to 35.0 m/s
    IP65 Water Resistance: Features an IP65-rated water-resistant design
    Data Logging and Recall: Includes a 100-point data logger with recall
    User-Friendly Display: Equipped with an LCD display for easy readability

Measuring wind speed
+ M / s 0.9 - 35.0 m / S
+ Km / h 2.5 - 126.0 Km / h
+ Mile / h 1.4 - 68.0 Knots
+ Knots from 144 to 6895 ft / min
+ Ft / min 1.6 - 78.2 Mile / h
Resolution / bias
m / s 0.1 m / s / ± (2% +0.2 m / S)
km / h 0.1 km / h / ± (2% +0.8 km / h)
mile / h 0.1 mile / h / ± (2% +0.4 knots)
knots 0.1 knots / ± (2% +40 ft / min)
ft / min 1 ft / min / ± (2% +0.4 Mile / h)