Humidity Indicator Window 40-80%

In the range of 40 to 80% relative humidity, the humidity indicator window enables reliable monitoring. The windows are used in sealed packaging and barrier layer systems without having to open the products. It can be read from the outside. To do this, the window is first unscrewed, the base is fixed to the packaging, and then the indicator window is closed again. This keeps the humidity indicator permanently visible while the interior of the packaging remains protected. As a quality control and assurance tool, the humidity indicator card shows whether critical humidity levels have been exceeded, so that measures such as replacing desiccants can be taken in good time. The indicator paper in the window changes color gradually from blue through violet to pink as humidity increases. The color change is reversible, allowing moisture development to be monitored over an extended period. For larger order quantities, please contact us.