Humidity Indicator Cards 10–60% RH | 50-Pack Blue Six-Point
Humidity Indicator Cards 10–60% RH | 50-Pack Blue Six-Point
HUXUAN Humidity Indicator Cards — 50-Pack, 10%–60% Range
Keep moisture under control with these Blue Six-Point Humidity Indicator Cards by HUXUAN. Designed for use inside sealed containers, storage bags, toolboxes, camera cases, electronics packaging, and more, these cards give you an instant, at-a-glance humidity reading — no batteries, no devices needed. Simply place a card inside your container and the color-coded dots change from blue (dry) to pink (moist) to indicate the current relative humidity level at six checkpoints: 10%, 20%, 30%, 40%, 50%, and 60%.
Made in Mainland China.
Key Features
- Instant Visual Reading: Six color-change dots clearly indicate humidity levels from 10% to 60% RH
- Wide Application: Perfect for sealed containers, storage cases, ammo cans, camera bags, electronics boxes, gun safes, and desiccant monitoring
- Laminated Cardboard Construction: Durable, moisture-resistant laminated card material for accurate, long-lasting use
- Convenient Size: Compact 10.5 × 4 cm (4.13 × 1.57 in) cards fit easily inside any container
- Great Value Pack: Comes with 50 cards per pack — ideal for multiple storage setups
- Color: White card with blue indicator dots
- No Power Required: Completely passive — no batteries or charging needed
Specifications
- Brand: HUXUAN
- Material: Laminated Cardboard
- Size: 10.5 × 4 cm / 4.13 × 1.57 in
- Color: White with blue indicator dots
- Measurement Range: 10%, 20%, 30%, 40%, 50%, 60% RH
- Package Includes: 50 × Humidity Indicator Cards
- Origin: Made in Mainland China
How to Use
- Remove a card from its protective packaging.
- Place the card inside your sealed container, bag, or case.
- Seal the container and check the card periodically.
- Blue dot = humidity is at or below that level. Pink/lavender dot = humidity has reached or exceeded that level.
- Replace or add desiccant as needed to maintain your desired humidity level.
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Learn more: Ready.gov emergency supply guidance
Frequently Asked Questions
Q: What is a humidity indicator card and how does it work?
A: A humidity indicator card is a passive, chemical-coated laminated card that changes color in response to relative humidity levels inside a sealed environment. The blue dots on the card turn pink or lavender when the humidity at that percentage level has been reached, giving you an instant, no-power-required visual reading of moisture conditions inside your container.
Q: What range of humidity do these six-point cards cover?
A: These blue six-point humidity indicator cards cover six humidity checkpoints: 10%, 20%, 30%, 40%, 50%, and 60% relative humidity (RH), making them suitable for a wide variety of storage and monitoring applications.
Q: Where can I use these humidity indicator cards?
A: These cards are ideal for any sealed or semi-sealed space where moisture monitoring is important — including toolboxes, gun safes, camera equipment cases, electronics storage boxes, food storage containers, shipping packages, ammo cans, and anywhere desiccant packs are used to control moisture.
Q: How many cards come in the package?
A: Each pack contains 50 humidity indicator cards, giving you plenty for use across multiple containers or ongoing monitoring needs.
Production & Packaging Notice
To maintain high stock availability and fast shipping times, our items are sourced from multiple verified manufacturing facilities. While the core quality, materials, and product specifications remain identical, you may notice slight variations in the packaging design, manufacturing origin, or the wording of the printed instructions.