AN25: Heat Index Anemometer

  • Built-in multiparameter sensors measure Air Velocity, Heat Index, Wet Bulb Globe Temperature (WBGT), Humidity, Ambient Temperature, Dew Point, Wet Bulb, Temperature, and Windchill
  • MIn/Max/Average (5sec/10sec/13sec)
  • Data Hold, Auto Power Off with disable
  • Replaceable Mini impeller (vane)
  • Complete with CR2032 battery
  • English Datasheet
  • English User’s Manual


Compact indoor/outdoor meter for measuring up to 7 environmental parameters

Extech’s AN25 pocket-sized Heat Index Anemometer Pen not only measures Air Velocity, but also monitors Heat Index during hot humid days to prevent heat stroke during outdoor activities, sporting events or, indoor workplace. Its pen-sized design makes it convenient to fit into your pocket and carry it wherever you go. Complete with CR2032 battery.

Specifications Range Resolution Basic Accuracy
Air Velocity
ft/min 80 to 4920ft/min 0.1ft/min, 1ft/min (>1000ft/min) ±3% FS
m/s 0.4 to 25m/s 0.1m/s ±3% FS
km/h 1.4 to 90.0km/h 0.1km/h ±3% FS
mph 0.9 to 55.9mph 0.1mph ±3% FS
knots 0.8 to 48.6 knots 0.1 knots ±3% FS
Temperature/Windchill 5 to 122°F (-15 to 50°C) 0.1°F/C ±2°F/1°C
Relative Humidity 5.0 to 95.0%RH 0.1%RH ±3%
Wet Bulb 5 to 122°F (-15 to 50°C) 0.1°F/°C
Dew Point -103 to 122°F (-75 to 50°C) 0.1°F/°C
Heat Index -31 to 401°F (-35 to 205°C) 0.1°F/°C
WBGT -20.2 to 130°F (-29 to 54.5°C) 0.1°F/°C
DImensions / Weight 6×1.6×0.7″ (152x40x18mm) / 2.1oz (60g)