Wisehic - Cobalt-free, Copper & Iron Series Humidity Indicators | High Sensitivity, Obvious Color Change Effect

Our organization is engaged 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.