EXTECH 45170

45170: Hygro-Thermo-Anemometer-Light Meter Pocket size rugged 4-in-1 meter for Humidity, Temperature, Air Velocity and Light Features: Ergonomic pocket size housing with large dual LCD simultaneous display of Temperature and Air Velocity or Relative Humidity Characters on display reverse direction depending on Hygro-Thermo-Anemometer or Light Mode Data Hold to freeze the displayed value Records Min/ Max readings Built-in low friction vane wheel improves accuracy of air velocity in ft/ min, MPH, m/ s, km/ h, and Knots Built-in precision thin-film capacitance humidity sensor for fast response Built in thermistor for ambient temperature measurements High temperature measurements using Type K thermocouple Utilizes precision photo diode and color correction filter Cosine and color corrected light measurements Auto power off, Low Battery and overrange indication Complete with built-in Humidity sensor, Light sensor and Vane wheel, wrist strap, and 9V battery