TSI Rotating Vane Anemometer

Accurately Measures Air Velocity and Temperature, Calculates Flow Rate, Performs Averaging And Can Determine Minimum and Maximum Readings. 

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The VelociCalc® Rotating Vane Anemometer 5725 is a high performance, yet simple - to - use, rotating vane anemometer. High accuracy and reliability make the VelociCalc 5725 the professional's ideal tool for measuring unevenly distributed or fluctuating flows through heating and cooling coils, diffusers, grilles, and filters.
It accurately measures air velocity and temperature, calculates flow rate, performs averaging, and can determine minimum and maximum readings. Using sweep mode you can quickly provide one averaged reading of velocity or volume over a large measurement area. The large vane head automatically averages velocity and volume readings. The VelociCalc 5725 includes variable time constant, sampling and statistics functions and data logging capability.
  • Reversible 4-inch (100 mm) head to read supply and exhaust flows
  • Calculates volumetric flow rate when user inputs duct shape and size, or area
  • Sampling function records multiple point measurements
  • Automatic averaging of air velocity
  • Simultaneously displays velocity and temperature
  • Sweep mode for one overall measurement
  • Optional 36-inch telescopic probe available
  • Compatible with optional Aircone flow hoods
  • Logs 12,700+ samples with a time and date stamp
  • Recall, review, store data
Range:  0 to 6000 ft/min (0 to 30 m/s)
Accuracy:  3.0% of reading or ±3 ft/min (±0.015 m/s), whichever is greater
Range (8345/46):  0 to 200 ?F (-17.8 to 93.3 ?C)
Range (8347/47A):  14 to 140 ?F (-10 to 60 ?C)
Resolution:  0.1 ?F (0.1?C)
Accuracy:  ±0.5 ?F (±0.3 ?C)
Instrument Temperature Range: 
Operating (electronics):  40 to 113 ?F (5 to 45 ?C)
Storage:  -22 to 194 ?F (-30 to 90 ?C)
Volumetric Flowrate: 
Range:  0.1 to 195,000 l/s, 0.0424 to 702,000 m3/hr, 0.2 to 2,700,000 ft3/min
Duct Size: 
Range:  1 to 100 inches in increments of 0.5 inches, 100 to 255 inches in increments of 1 inch (1 to 100 cm in increments of 0.5 cm, 100 to 255 cm in increments of 1 cm)
Relative Humidity (MODELS 8347/8347A):
Range:  0 to 95% RH
Accuracy  5: ±3% RH
Resolution:  0.1% RH
Wet Bulb Temperature (MODELS 8347/8347A):
Range:  40 to 140°F (5 to 60°C)
Resolution:  0.1°F (0.1°C)
Dew Point (MODEL 8347/8347A):
Range:  5 to 120°F (-15 to 49°C)
Resolution:  0.1°F (0.1°C)
Averaging Capability: 
Range:  Up to 255 values of each velocity (or flowrate), temperature, humidity, dew point temperature, and wet bulb temperature
Time Constant: 
Range:   Adjustable from 1 to 20 seconds
Response Time: 
To Velocity:  200 msec
To Temperature: 8345/46: 8 seconds
8347/47A: 34 seconds
External Meter Dimensions: 
Size measurements:  3.9 in. x 6.6 in. x 1.5 in. (10 cm x 16.8 cm x 3.8 cm)
Meter Probe Dimensions:
Probe Length (8345):  37 in. (94 cm) telescopic
Probe Length (8346):  37 in. (94 cm) telescopic articulating
Probe Length (8347):  40 in. (102 cm) telescopic
Probe Length (8347A):  40 in. (102 cm) telescopic articulating
Meter Weight Dimensions:
Weight (with batteries):  1.1 lbs (0.5 kg)
Meter Display Dimensions: 
Display:  4-digit LCD, 0.6 in. (15 mm) digit height
Power Requirements: 
Four AA-size batteries (included) or AC adapter (optional)


  • Heating and cooling coil analysis
  • Diffuser and grille measurements
  • Fume hood face velocity tests
  • Indoor air quality tests
  • Filter face velocity measurements