The Fieldpiece Non-Contact Infrared Temperature Accessory with Laser Sight, Model ATIR3, Collects Infrared Energy (IR) and Converts It To A MVDC Signal That Is Proportional To The Temperature Being Measured. The Temperature Measured Is The Average Of All The Temperatures In The 8:1 Cone Of View Ability. The Closer You Are To The Target, The Smaller The Area Measured. The Further Away, The Larger The Area. The Digital, Non-Contact ATIR3 Converts The Fieldpiece"Stick" Series Meter, DL3 Data Logger, and EHDL1 Electronic Handle To A One-Piece Infrared, or Ir, Thermometer. Use The Optional Fieldpiece ADLS2 Deluxe Silicone Test Leads or The AHDL1 Adapter Handle with The ATIR3 For Use with Dmms with Industry Standard Jacks.