"This product works well to measure the humidity but it does not stick to the side very well in high humidity (which hermit crabs MUST have) so it would work better for dry habitats. If you don't have the money for a digital one or one that hangs (not sticks) then this will work but don't be surprised when it falls down. Overall I would recommend it to a friend! Another plus is that it comes in different colors and you can match it to your animal's habitat or to your personal preference!"