The QCT condensation tester was developed in 1965 by Q-Lab Corporation. Also called the “Cleveland Condensation Tester,” its innovative design simulated the damaging effects of outdoor moisture attack by condensing warm water directly onto test specimens.

It uses condensing humidity to simulate and accelerate damage caused by rain and dew on paints and other materials. In a few days or weeks, the QCT tester could reproduce damage due to moisture that occurs over months or years outdoors.

The tester was designed to be fast, reliable, and easy to use. Today, thousands of labs in over 50 countries rely on this technology to replace water immersion and ordinary humidity tests.

Read more here