More information about how an anemometer works in this link.
The OMEGA™ HHF141 rotating vane
anemometer is a high-quality
instrument providing highly accurate
air velocity measurements in harsh
environments via a user-friendly
and intuitive interface. Applications
include manufacturing, laboratory,
computer rooms, environmental
control, HVAC, and
other applications where precise air
measurement is required.
SPECIFICATIONS Ranges HHF141A: 25 mm (1") probe, 1.5 to 35.00 MPS (300 to 6800 FPM) HHF141B: 70 mm (2 3/4") probe, 0.2 to 40.00 MPS (40 to 7800 FPM) Accuracy: Air Velocity: 70 mm Vane: ±1.0% of reading ±1-digit 25 mm Vane: ±(0.75% of reading +0.5% FS) ±1-digit Resolution: 1 FPM or 0.01 MPS Display: 12.7 mm LCD, 4-digits, with LED backlight Operating Temp: Instrument: 0 to 50°C Probe: -20 to 100°C Power Supply: 3 "AA" alkaline batteries (included) Battery Life: Approximately 150 hours Dimensions: Instrument: 165 x 83 x 38 mm HHF140A: 25 mm diameter head HHF140B: 70 mm diameter head Cable: 1.5 m Outputs (Optional): USB or 0 to 5 Vdc analogue signal
† All amounts shown in EUR, GBP, or USD Note: Comes with vane sensor [25 or 70 mm (1 or 2 ¾") depending on model], 3 extension rods (flexible, straight and with handle), 1.5 m (5') cable, 3 "AA" alkaline batteries, hard carrying case and user's manual. For units with RS232 communications add "-232" to the model number, contact sales for pricing and to order