We have an ETS 5472 ultrasonic humidifier with a 1.7 MHz ceramic resonator that generates an extremely fine, homogeneous micro-mist. This type of mist produces microscopic droplets that remain suspended in the air, which saturates the chamber uniformly and accurately reproduces condensation events, surface moisture, penetration into cavities, and the interaction of humidity with changing temperatures.
The air injection pump delivers this mist into the chamber at a higher velocity, reducing humidity recovery time and achieving a more uniform distribution throughout the test volume. This system is especially useful for simulations in which humidity must reach the device quickly before, during or after an abrupt thermal change.
Combining fine micro-mist with thermal variations makes it possible to reproduce situations that are extremely difficult to simulate in conventional chambers, such as internal condensation on hot components, moisture absorption in polymeric materials, seal behavior under humid cycling, and humid thermal shock effects where the water-surface interaction has a direct impact on product performance.
The Hioki Multichannel recorder, at 20 MS/s, can record not only temperature and humidity changes but also the device’s transient electrical behavior while the micro-mist contacts cold or hot surfaces. This is vital for identifying micro-shorts, occasional arcing or resistive variations caused by instantaneous condensation. The high time resolution reveals these faults with a clarity that other systems simply cannot achieve.
In addition, complete test documentation is delivered, with photographs, video, comparative analysis and technical conclusions. This makes it possible to understand in depth how the device responds to the presence of micro-mist combined with aggressive thermal ramps.
