Thermal Anemometer

Thermal Anemometer

  • TSI - VelociCalc 9515

Ideal tool for face velocity measurements in fume hoods, spray booths, or for IAQ and ventilation system checks. 

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The Thermal Anemometer VelociCalc® 9515 Thermal Anemometer is an economical choice, with no compromise on precision or accuracy.

It's the ideal tool for professionals to measure the face velocity of laboratory fume hoods, spray booths or for ventilation system checks. The 9515 is equipped with a 101.6 cm telescopic probe for measurements in hard-to-reach places. It can also measure temperature.

Features and Benefits

  • Accurate air velocity measurement - range 0 to 4,000 ft/min (0 to 20 m/s)
  • Integrated probe attachment
  • Easy to read display
  • Calibration certificate included



  • HVAC system performance
  • Commissioning
  • Plant maintenance



The Model 9515 is the economical choice for a digital Air Velocity Meter, without compromising accuracy or precision. Professionals find them the ideal tool for face velocity measurements in fume hoods, spray booths, or for IAQ and ventilation system checks. The Model 9515 features a 40-inch (101.6 cm) telescoping integrated probe for difficult to reach measurements.



Range 0 to 4,000 ft/min (0 to 20 m/s)
Accuracy 1&2 ±5% of reading or ±5 ft/min (±0.025 m/s), whichever is greater
Resolution 1 ft/min (0.01 m/s)
Range 0 to 200°F (-18 to 93°C)
Accuracy3±0.5°F ( ±0.3°C)
Resolution0.1°F (0.1°C)
Instrument Temperature Range
Operating (Electronics) 40 to 113°F (5 to 45°C)
Operating (Probe) 0 to 200°F (-18 to 93°C)
Storage -4 to 140°F (-20 to 60°C)
External Meter Dimensions
3.3 in. x 7.0 in. x 1.8 in. (8.4 cm x 17.8 cm x 4.4 cm)
Probe Dimensions
Length 40 in. (101.6 cm)
Diameter of Tip 0.28 in. (7 mm)
Diameter of Base 0.51 in. (13 mm)
Meter Weight with Batteries
9.6 oz. (270 g)

Temperature compensated over an air temperature range of 40 to 150°F (5 to 65°C).
The accuracy statement begins at 30 ft/min through 4000 ft/min. (0.15 m/s through 20 m/s).
3 Accuracy with instrument case at 77°F (25°C),add uncertainty of 0.05°F/°F