Humidity / Damp Heat Testing

MSASPL provides humidity and damp heat testing support to evaluate how electronic and electrical products behave under controlled high-humidity conditions. Moisture exposure can influence insulation resistance, PCB assemblies, connectors, coatings, sensors, displays, adhesives and corrosion-sensitive interfaces.

What is humidity / damp heat testing?

Humidity testing conditions a DUT at a defined temperature and relative humidity for an agreed period. Depending on the requirement, the profile may be steady-state or cyclic. The objective is to evaluate resistance to moisture-related effects during storage, transportation or use.

Why humidity testing matters

High humidity can promote leakage currents, insulation degradation, corrosion, swelling of hygroscopic materials, connector instability and sensor drift. Early evaluation helps identify vulnerable materials, interfaces and protective measures.

Typical issues that can be observed

Suitable products and applications

How MSASPL can structure the evaluation

Standards and test-plan reference

Possible references include IEC 60068-2-78:2025 for damp heat, steady state, and IEC 60068-2-30:2025 for damp heat, cyclic. The correct method depends on whether the requirement calls for constant high humidity, cyclic temperature changes and/or condensation.

Frequently Asked Questions

Humidity testing is a general term. Damp heat testing is a standardized environmental test family using controlled temperature and relative humidity. The exact method may be steady-state or cyclic.
No. Steady-state damp heat is generally used for high humidity without condensation, while some cyclic damp heat methods are intended to create condensation. The required method must be confirmed before testing.
Moisture exposure can reveal insulation changes, leakage, sensor drift, connector instability, coating weakness, fogging, corrosion susceptibility and intermittent operation.
It depends on the standard and customer requirement. Some evaluations permit or require operating checks, while others are primarily conditioning tests.
Provide the required temperature, relative humidity, duration/cycles, condensation requirement, DUT operating state, monitoring points and acceptance criteria.
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