Extech 45170  

Extech 45170: 4-in-1 Environmental Meter

Pocket-size rugged meter for Humidity, Temperature, Air Velocity and Light

This 4-in-1 meter measures Humidity, Temperature, Air Velocity and Light. The dual LCD simultaneously displays Temperature and Air Velocity or Relative Humidity. High Temperature air or surface measurements can be made using the built-in Type K input. Comes complete with built-in Humidity sensor, Light sensor and Vane wheel, wrist strap, and 9-Volt battery.