50-90% max and current humidity indicator card (pack of 25)


MXC56789 Maximum and Current Humidity Indicator Card (package of 25 cards) was designed for applications which require monitoring the maximum humidity attained when exposed for a period of 24 hours or more, in addition to the current humidity. Each level of humidity indicated on these cards is represented by a blue crystal which dissolves when the relative humidity (RH) level exceeds the humidity shown below it. When the crystals dissolve, they create a large blue spot above the indicated humidity.  You can also see the current humidity in the bottom section

Example: If the highest humidity level reached is 70% RH, then all circles up to and including 70% will have dissolved crystals and the area surrounding each circle will be stained blue.

Package of 25 cards.

In-stock and can ship today!
(orders received by 2:00pm EST)