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Thermal Anemometer Environment

Thermal Anemometer from TSI

Product Code:VelociCalc 9535, 9535A, 9545 et 9545A

Need more Info? (514) 354-2511 - 1-800-463-4363

Features and Benefits
Model 9545
• Simple to operate
• Accurate air velocity measurement
• Simultaneously measure temperature and velocity
• Displays up to three measurements simultaneously
• Measures humidity (Model 9545 and 9545-A)
• Calculates volumetric flow, and actual/standard velocity
• Data log 12,700+ samples and 100 test IDs
• LogDat2TM downloading software included
• Articulated probe versions available (9535-A and 9545-A)
• HVAC system performance
• Commissioning
• Simple to operate
• Plant maintenance
• Critical environment certification
• Duct traverses
The Models 9535 and 9545 thermal anemometers are like having multiple meters—for the price of just one. These meters simultaneously measure and data log several ventilation parameters using a single probe with multiple sensors. Both models measure velocity, temperature and calculate flow. The Model 9545 also measures relative humidity, and calculates dew point, and wet bulb temperature. Models 9535 and 9545 have telescopic straight probes; Models 9535-A and 9545-A have telescopic articulated probes.


VELOCICALC Models 9535 and 9545
Range  0 to 6,000 ft/min (0 to 30 m/s)
Accuracy 1&2  ±3% of reading or ±3 ft/min (±0.015 m/s), whichever is greater
Resolution  1 ft/min (0.01 m/s)
Duct Size
Dimensions 1 to 250 inches in increments of 0.1 in.
(1 to 635 cm in increments of 0.1 cm)
Volumetric Flow Rate
Range  Actual range is a function of velocity, and duct size
Range (9535 and 9535-A) 0 to 200 °F (-17.8 to 93.3°C)
Range (9545 and 9545-A)  14 to 140°F (-10 to 60°C)
Accuracy3 ±0.5°F (±0.3°C)
Resolution  0.1°F (0.1°C)
Relative Humidity (9545 only)
Range 0 to 95% RH
Accuracy4  ±3% RH
Range  0.1% RH
Instrument Temperature Range
Operating (Electronics)  40 to 113°F (5 to 45°C)
Model 9535 Operating (Probe)  0 to 200°F (-18 to 93°C)
Model 9545 Operating (Probe)  14 to 140°F (-10 to 60°C)
Storage  -4 to 140°F (-20 to 60°C)
Data Storage Capabilities
Range  12,700+ samples and 100 test IDs
Logging Interval
1 second to 1 hour
Time Constant
User selectable
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)
Meter Weight with Batteries
0.6 lbs. (0.27 kg)
Meter Probe Dimensions
Probe Length  40 in. (101.6 cm)
Probe Diameter of Tip  0.28 in. (7.0 mm)
Probe Diameter of Base  0.51 in. (13.0 mm)
Articulating Probe Dimensions
Articulating Section Length 6.4 in. (16.26 cm)
Diameter of Articulating Knuckle 0.38 in. (9.5 mm)
Power Requirements  Four AA-size batteries or AC adapter


Humidity, wet bulb, dew point  
Probe Straight or - Articulated Straight or - Articulated
Variable time constant
Manual data logging
Auto save data logging
Review data
LogDat2 downloading software
Free Certificate of Calibration
  1. Temperature compensated over an air temperature range of 40 to 150°F (5 to 65°C).
  2. The accuracy statement begins at 30 ft/min through 6,000 ft/min (0.15 m/s through 30 m/s).
  3. Accuracy with instrument case at 77°F (25°C), add uncertainty of 0.05°F/°F (0.03°C/°C) for change in instrument temperature.
  4. Accuracy with probe at 77°F (25°C). Add uncertainty of 0.1% RH/°F (0.2% RH/°C) for change in probe temperature. Includes 1% hysteresis.

Specifications are subject to change without notice.


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