Humidity Indicator (Wisehic) - Cobalt-free, Copper And Iron Series | High Sensitivity, Obvious Color Change From Brown To Green And Blue To Pink

We are instrumental in providing to our valuable customers excellent quality Humidity Indicator (WiseHIC) which is available with following Features:-
> Cobalt series humidity indicator:-
High sensitivity, accurate indication: Indicator containing CoC12 is very sensitive to humidity.
Obvious effects in color change: Cobalt containing series humidity indicator is blue when dry, and changes into pink after absorbing moisture, the contrast effect between different colors is very obvious.

> Copper series humidity indicator:-
Not containing CoC12: EU environmental regulation 2004/73/EC lists CoC12 as Class II carcinogenic substance, all products are banned from using products containing CoC12, whereas copper containing series humidity indicator is exactly cobalt-free indicator, therefore it conforms to EU requirements.
Similarly obvious changing effect in color: Copper containing series humidity indicator is brown when dry, and changes into green after absorbing moisture, its color changing effect is also obvious.

> Iron series humidity indicator:-
Not containing cobalt: This series of humidity indicator also does not contain cobalt, therefore conforming to stipulations of EU environmental regulation 2004/73/EC.
Not containing heavy metal: Heavy metals such as copper will also bring harm to human health under certain circumstances; this series of humidity indicator truly does not contain any heavy metal, therefore is safer and more eco-friendly.