Macherey-Nagel
On demand
Macherey-Nagel humidity indicator for relative humidity inside a sealed package, in one presentation.
90801
A humidity indicator that shows relative humidity inside a sealed package, from outside it as a colour, continuously and without power.
Electronics, optics and instruments are shipped sealed with desiccant, and the only question on arrival is whether the seal held. A self-adhesive indicator inside the bag answers that through the window without opening anything — because opening it is what would ruin the evidence.
The indicator sits inside the enclosure and changes colour with the humidity around it. There is nothing to switch on, nothing to calibrate and no reading to take on a schedule — it is simply looked at, through the window or on opening.
It reports the condition at the moment it is read. It is not a data logger and does not record what happened while nobody was watching.
The indicator responds to the air around it, not to the product; a reading taken right after opening is already wrong.
Supplied in one presentation.