The TSI Alnor VelociCalc 9515 air velocity meter is a digital meter typically used for face velocity measurements in fume hoods, spray booths or IAQ and ventilation system checks. The VelociCalc 9515 features a 40-inch (101.6 cm) telescoping integrated probe for difficult to reach measurements.
With an accuracy of ±5% of reading or ±5 ft/min (±0.025 m/s), TSI Alnor VelociCalc 9515 air velocity meters measure air velocity over a range from 0 to 4000 ft/min (0 to 20 m/s). The TSI Alnor VelociCalc 9515 also measures temperatures from 0 to 200°F (-18 to 93°C) with an accuracy of ±0.5°F (±0.3°C).