Humidity Indicator Card
Humidity indicator card is the visual indicator device placed in dry packs to show internal relative humidity exposure - it provides quick verification of moisture-control integrity before assembly use.
What Is Humidity indicator card?
- Definition: Card spots change color when humidity exceeds specified threshold levels.
- Purpose: Confirms whether dry-pack conditions remained within acceptable limits.
- Placement: Inserted with components and desiccant inside the moisture barrier bag.
- Interpretation: Reading requires comparison with reference colors at package-open time.
Why Humidity indicator card Matters
- Decision Support: Guides whether parts can proceed to line or require bake recovery.
- Traceability: Provides objective evidence of storage condition at point of use.
- Risk Screening: Detects barrier-seal failures that could otherwise go unnoticed.
- Compliance: Common requirement in standardized dry-pack procedures.
- Human Factor: Incorrect interpretation can lead to wrong handling decisions.
How It Is Used in Practice
- Reading Procedure: Train operators on timing and lighting conditions for consistent interpretation.
- Recordkeeping: Log HIC status at receiving and line issue checkpoints.
- Escalation Rules: Define clear criteria for hold, bake, or return based on indicator states.
Humidity indicator card is an essential visual control for moisture-safe component handling - humidity indicator card value depends on standardized interpretation and action protocols.