• EN300
  • Usually ships in 3-5 business days



  • Data Hold to freeze the displayed value
  • Records Min/Max readings
  • Type K input measures temperature to 2372° (1300°C)
  • Utilizes precision photo diode and correction filter for Cosine and color corrected light measurements
  • Sound Level measurement meets IEC 61672 class 2 using A frequency weighting and fast response time
  • Defaults to last function when powered off
  • Auto power off 10 minutes after last key is pressed with disable feature
  • Low Battery and overrange indication
  • Tripod mount
  • RS-232 PC interface


The Extech EN300 Environmental Meter has a Large dual LCD simultaneous display of Temperature and Air Velocity or Relative Humidity. Characters on the display reverse direction depending on Hygro-Thermo-Anemometer or Light-Sound Mode. The EN300 has a built-in low friction vane wheel that improves accuracy of air velocity in ft/min, MPH, m/s, km/h, and Knots. It also has a built-in precision thin-film capacitance humidity sensor for fast response and thermistor for ambient temperature measurements.

The EN300 comes complete with:

  • Built-in humidity, light, sound and temperature sensors
  • Vane wheel
  • Windscreen
  • Type K thermocouple probe
  • pouch case six 1.5V AAA batteries