OEM Electronics · Updated July 24, 2026

ESD Humidity Control with Mist Maker Modules

Mist maker modules can be integrated into equipment that supports humidity control in electronics production and ESD-sensitive areas. The module itself only creates fog. The OEM system must ensure that the fog evaporates, the RH sensor reads representative air and no mineral residue or droplets reach products.

This application requires careful integration because electrical equipment, cleanliness and process stability matter as much as nominal mist output.

Define the role of humidity

Humidity can reduce charge accumulation on many surfaces, but the complete ESD program must still include grounding, ionization, conductive materials and personal controls.

The humidifier should maintain the approved environmental range rather than being treated as the only anti-static device.

Use suitable water

Low-mineral water reduces white dust and deposits. In clean or sensitive areas, water treatment should be part of the equipment design from the start.

Provide a covered tank, filtration where required and a cleaning method that does not introduce residue.

Design the tank and level control

Keep water depth stable above every ceramic disc. Add low-water shutdown, controlled refill, overflow protection and drainage.

Separate the inlet stream from the atomizing zone so turbulence and debris do not disturb the modules.

Control the airflow

The fan should deliver fully mixed humid air, not visible droplets. Include space for large droplets to fall back into the tank before the air reaches the outlet.

Avoid directing fog toward PCB assemblies, electrical cabinets or sensors.

Place the RH sensor correctly

Mount the sensor in representative process air away from the discharge plume. For long production lines, verify the far end of the zone rather than controlling only near the unit.

Use staged modules or multiple units when one outlet cannot provide uniform distribution.

Electrical integration

Use matched power supplies, protective earth and correctly rated switching components. Keep drivers and connectors above possible water levels.

Separate mains, DC power and sensor wiring and provide service access without opening the wet chamber.

Commissioning and maintenance

Run the equipment under normal ventilation and production heat. Measure RH at several positions and inspect for residue or condensation.

Schedule tank cleaning, disc inspection and sensor verification. Stable control depends on maintaining both atomization and airflow.

Project note: For electronics applications, specify the required water quality and cleanliness standard together with mist output and RH range.

OEM Integration Questions

Can MS modules be switched by a PLC?

Yes. The OEM should use correctly rated switching and interlocks so atomization stops on low water, fan failure or other equipment faults.

Should the fan stop at the same time as atomization?

A short fan delay can help clear residual mist from the chamber or duct. The exact sequence should match the equipment layout and control design.

What information is needed to select a module?

Send required mist output, tank dimensions, airflow, voltage, control method, operating hours and water quality.