Use the Vaneometer swing vane anemometer to measure velocity of air flow into laboratory fume hoods and at paint spray booths to determine when to change filters. Or wherever needed to meet OSHA standards of ventilation for smoke, dust or fume removal. The 480 Vaneometer Swing Vane Anemometer is a durable, economically priced instrument specifically designed to simplify the measurement of low-velocity air moving hosizintally. It is accurate to ±5% of full-scale to 100 FPM and ±10% from 100 FPM to the top of scale. It has a spirit level to ensure accurate readings. Large numerical scales on both sides are easy to read. Small size and weight make for easy portability. Easy-to-clean ABS plastic housing. Complete with mounting kit, two indicator vanes and instructions.