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  • Writer's pictureHanse Environmental

Ultrasonic Humidification Systems

System Description

The humidification systems provided with Hanse Environmental, Inc. chambers utilize the latest in ultrasonic nebulization principles to generate the moisture required in the chamber. The ultrasonic nozzle uses air and water under pressure. Atomized water leaving the nozzle is hit by the air reflected by the resonator as sound waves.  It is then nebulized into very small particles, like a fog, and rapidly absorbed by the air. The resonator is adjusted at the factory for maximum atomization and proper fog pattern. The fog pattern can be narrowed by moving the resonator further from the nozzle tip, and conversely, widened by moving the resonator closer to the tip.

The water used in the humidification system can be demineralized by the optional  D.I. bottle. In addition, a water quality light is included to monitor the quality of the water generated by the D.I. bottle. The D.I. bottles are a mixture of bed resin that contains positive and negative charged resins.  These resins remove the minerals from the water. The D.I. bottle supplied with the Hanse Chamber is a 1 cubic foot bottle.


The nozzle(s) is installed at the factory for proper distribution of the moisture introduced into the chamber. Even though the nozzle(s) is designed for the temperature extremes experienced in the normal operation of the chamber, it is recommended that the nozzle(s) be removed when humidification testing is not being performed. The nozzle(s) mounting brackets are designed for ease of installation and removal. The direction of the nozzle(s) has been determined at the factory to maximize the distribution of the moisture within the chamber and should be maintained within the configuration.

The nozzle(s) is  provided with hose connections that can be made within the confines of the chamber when installing or removing it. This will reduce the time required to go into humidification testing.


The water and air supply to the nozzle(s) is regulated by in-line pressure regulators. The water pressure to the nozzle(s) is adjusted at the factory to provide the proper amount of moisture to the chamber. The air regulator should be adjusted to maintain the air pressure to the nozzle(s) at a  minimum of 15 psi above the water line pressure. This is necessary to provide enough air pressure to open the water valve internally to the nozzle. This will  allow atomization to begin. The air and water supplies to the nozzle(s) are controlled by 24 vdc control valves.

The valves are controlled by the mode of operation of the chamber. When the humidification mode is disabled, Event 4 (digital out 4), the water supply is turned off ,and the line(s) is vented to drain. Similarly, the air lines are turned off and ported to exhaust also. This prevents an inadvertent operation of the system.

When humidity is called for, Event 4 (digital out 4) enabled, and the nozzle(s) have been installed in the chamber, the water valve opens applying pressure to the nozzle(s). In addition, when the set point is above the humidity level in the chamber, the air valve opens which applies air pressure to the nozzle(s). This air pressure results in the opening of the water valve internal to the nozzle(s) and the atomization process is started.

As the humidity level in the chamber reaches the set point, the control system will start controlling the air valve to take control of the humidity level in the chamber. The valve will remove air pressure from the nozzle(s) for longer and longer periods to control the humidity level within the set point parameters.

If the humidity function is turned off, Event 4 (digital out 4), then the system reverts back to the condition described above and the air and water lines are ported to exhaust condition. At this point the nozzle(s) can be safely removed from the chamber once they have cooled off.

If during normal operation of the humidification system the water quality light goes from green to red, the D.I. bottle should be scheduled for regeneration at the earliest possible time with out interrupting a test. The water quality light may indicate red if the system has been sitting for some time between operation. To test if the water is OK, run a small amount of water through the system. The light will turn green immediately if the D.I. bottle is OK.

If the system is going to be operated for long periods of time in the humidification mode, it is recommended that a second D.I. bottle be installed with the water quality light in the line between the bottles. In this matter, if the light indicates that the water quality from the first bottle is not in spec, the water is still being treated by the second bottle and will continue to meet the water quality requirements of the system. When the humidification test is completed, put a second bottle in the place of the first bottle, have the first bottle regenerated and place it no the location of the second bottle. In this matter you will utilize the bottles to their maximum, and not regenerate them unnecessarily.



The humidification nozzle(s) do not require routine maintenance. The water supplied to them should be free of debris and suspended solids, and it is recommended that a 10 micron filter be installed between the chamber and the water supply. This will prevent premature plugging of the nozzle tip.

The D.I. water bottles will require periodic regeneration that is dependent on the frequency of use and the quality of the raw water system. If the chamber is to be installed in a location that has particularly hard water or water with high mineral content, it is recommended that a second D.I. bottle be installed, or a small Reverse Osmosis system be installed ahead of the D.I. bottle(s) to extend their life. This system can be sized by the factory and local installation arranged if desired.

Regeneration of the D.I. bottles can be done by any qualified pure water vendor. In Michigan, call Hi-Tech Environments at (810) 620-3333 for the name of the nearest qualified vendor or to arrange for replacement bottles.


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