What is the purpose of the humidity indicator in the observation port?
When the packages were opened, the humidity indicator card, now known to the industry as an HIC, displays if the level of humidity present is acceptable. This measure, in turn, tells manufacturing personnel how much heat drying is required to prepare devices and to ensure a trouble-free final reflow/assembly process.
How do humidity indicators work?
HOW DO HUMIDITY INDICATOR CARDS WORK? Humidity indicator cards are impregnated with a solution of cobalt chloride that has been carefully mixed to change color from blue through various shades of magenta – red, to a pink. enjoy a much longer and more reliable life if they are maintained at a very low relative humidity.
How do you store humidity indicators?
Humidity Indicator Cards containers should be stored in a dry, well ventilated room with a reasonably consistent temperature of 75°F (24°C) and be protected from exposure to direct sunlight, and should not be stored in ultraviolet sunlight, moisture, or heat.
What color is humidity?
They are available in many configurations and used in many applications, especially military and semiconductor. The most common humidity indicator cards change color from blue (less than indicated RH level) to pink (greater than indicated RH level).
What is a humidity indicator?
A humidity indicator is a moisture-sensitive chemical that changes color when the indicated relative humidity is exceeded.
Does a blue Colour indicate dry or humid air?
The humidity indicator spots will change from blue (dry condition) to pink (humid condition) as the relative humidity changes in the volume of air surrounding the indicator.
Are humidity indicator cards reusable?
The humidity card itself is reusable. When the humidity level is low, the dots will change from pink to blue again. With long use, the color of the dots may faint. Then, you can replace the card.
What is humidity limit?
During the summer months, the average humidity should weigh in between 30-45 percent (below the 50% mark). Winter may require lower than 40% relative humidity to avoid condensation on your windows. By staying in the proper ranges, problems can be prevented.