Extech 45118 Mini Thermo-Anemometer


Extech 45118 Mini Thermo-Anemometer Waterproof pocket size meter with Air Velocity, Temperature and Windchill. 



  • Display Air Velocity and Temperature or Windchill
  • Selectable averaging function of 5, 10, or 13 second intervals
  • Fold up protective housing extends to 9" (229mm) for better reach
  • Tripod mount
  • Data Hold with Auto power off

Mini Thermo-Anemometer
Waterproof pocket size with Air Velocity, Temperature and Windchill

Mini thermo-anemometer features fold-up protective housing that extends to 9" for better reach. The large dual display shows air velocity readings up to 62.5 MPH (or equivalent) and temperature readings. The Extech 45118 mini thermo-anemometer has a data hold feature to freeze the most recent display. To conserve batteries the auto shutoff feature turns off the Extech 45118 20 minutes after the last key is pressed. The water resistant housing floats and is drop tested to 6 feet.

Mini thermo-anemometer measures windspeed in ft/min, MPH, m/s, km/h, knots, and Beaufort Force. It features a selectable averaging function of 5, 10, or 13 second intervals. The wind vane (impeller) is replaceable and made of non-corrosive plastic. The meter also measures temperatures from 0 to 122°F at 1.8°F/1°C accuracy.

Mini thermo-anemometer ships complete with a CR2032 lithium battery and lanyard.

Click here for product datasheet


General Specifications
Display Dual LCD with multifunction indicators
Measurements Knots, km/h, MPH, ft/min, m/sec, Beaufort force, windchill, and temperature (C/F)
Wind-speed Moving 2 second average with 2 second gust detect
Sensor Sapphire bearing, non-corrosive vane for air velocity and precision thermistor for temperature
Average Mode Choice of 5, 10, or 13 second average readings
Max Display Push button highest reading recall
Data hold Freeze most recent display
Sample time 1 reading per second
Water-resistant To 3’ (1 meter)
Min/Max wind-speed 1.1 to 62.5 MPH
Operating temperature 5° to 122°F (-15° to 50°C)
Operating humidity < 80% RH
Power supply Lithium battery type CR-2032 or equivalent
Battery life 400 hours approx.
Weight 3 oz. ( 95 g )
Dimensions Instrument 5.25 x 2.75 x 0.75” (133 x 70 x 19mm)
Vane 1” ( 24mm ) diameter
MPH (Miles per hour)
Range 1.1 to 62.5 MPH
Resolution 0.2 MPH
Accuracy ± (3%rdg +0.4MPH)
km/hr (kilometers per hour)
Range 1.8 to 100.6 km/h
Resolution 0.7 km/h
Accuracy ± (3%rdg +1.4km/h)
Knots (nautical miles per hour)
Range 1.0 to 54.3 knots
Resolution 0.3 knots
Accuracy ± (3%rdg +0.6knots)
m/sec (meters per second)
Range 0.50 to 28.00 m/s
Resolution 0.01 m/s
Accuracy ± (3%rdg +0.2m/s)
ft/min (feet per minute)
Range 100 to 5500 ft/min
Resolution 20ft/min
Accuracy ± (3%rdg +40ft/min)
Beaufort force
Range 1 to 17 BF
Resolution 1 BF
Accuracy ± 1
Product Images (click to enlarge)
  • Extech 45118 Mini Thermo-Anemometer