OL UV-40 Ultraviolet Irradiance Standard (200 – 400 nm)
The OL UV-40 consists of a stable, 30-watt deuterium lamp with an ultraviolet transmitting suprasil window.
OL UV-40U Ultraviolet Irradiance Standard (Seasoned)
Prior to calibration, each lamp is seasoned for 24 hours. Stability tests indicate that after the initial burn-in, the irradiance generally remains constant to within ±2% for a period of 50 hours use. The aging of the standard is not a function of the shelf life.
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