QUV models: QUV/se | QUV/spray | QUV/basic | QUV/cw
View LU-0813 specification sheet for comparative capabilities.

The QUV/spray is the same as a standard QUV/se, but also includes a water spray system consisting of spray nozzles, piping, controls and drain.

Short periods of spray can be used to create a thermal shock. Longer periods can be used to achieve mechanical erosion. The QUV/spray can be set to produce the following conditions:  UV alone, spray alone, or condensation. Deionized water is recommended for most spray applications.

This is a simplified version of the QUV for the lab where economy is critical. Irradiance is controlled by periodic lamp replacement and repositioning. The QUV/basic has a condensation system for moisture simulation. It does not have water spray.

The QUV/basic does not have the Solar Eye Irradiance Control system. Consequently, the light intensity cannot be adjusted or calibrated. This means the QUV/basic cannot be used for high irradiance testing.

We recommend the QUV/basic for comparative exposures where the test specimens and the control specimens are exposed at the same time in the same tester.

Some industries have test methods that specify the use of cool white lamps for indoor photostability testing. To reproduce indoor light conditions, the QUV/cw has a Solar Eye Irradiance Control system which has been modified to monitor and control the light output of cool white fluorescent lamps. See Q-Lab Bulletin LU-0823, QUV/cw Cool White Photostability Tester for more information.

The QUV/cw uses cool white lamps to simulate indoor environments, such as the overhead fluore-
scent lighting typically found in offices. It also meets ISO, ANSI and ASTM test methods for indoor photostability testing.