Ideal when space is limited, combining a Humidity Indicator and Relief Valve together will only require one hole to be fitted to equipment or containers. They are designed for mounting in moisture sensitive electronic or electro-optic equipment, or any other humidity controlled enclosure that will be subjected to air transportation. It monitors and readily detect changes in the humidity of the space. The humidity sensor paper changes from blue to pink in colour as the humidity increases, and reverts back to blue when the humidity decreases.
Most of the units can be fitted with a desiccant cartridge which will adsorb and remove any moisture entering the equipment during its use!