The NIST-specific constant temperature integrating sphere is specially designed to meet the requirements of the National Institute of Standards and Technology (NIST) in the United States, enabling precise measurement of high-power LED devices, modules, and lamps. It complies with the integrating sphere specifications outlined in the IES LM-79-08 standard.

There are three methods to control the temperature of testing LED products:

• Circular thermostatic air on the inner surface of  the sphere from top-in to bottom-out

• TEC cooling base of lamp holder in the center of sphere with 4π geometry

• TEC cooling base of window connector on the side port of sphere with 2π geometry

Features:

• Integrated temporal photometer inside used for light oscillograph and flicker analysis

• Mini-video camera in the sphere to capture the burning scene of testing lamp

• Auxiliary lamp used to eliminate self-absorption affection

• A transparent LED cover for Anti-dew, compatible interface to vacuum pump

• Enable to integrated with Spectroradiometer

• Laser alignment for installation of tested lamps in the center

• The speed of airflow is much less than 0.2m/s