Silica Gel Indicating

Self-indicating silica gels will adsorb moisture in exactly the same way as standard non indicating gel or white silica gel, but they will literally indicate when they are becoming saturated by changing their colour.

This is useful in two ways. Firstly, a silica gel sachet or breather unit where the gel has changed colour, gives an immediate warning that it should be replaced.

Secondly, if regenerating the silica gel, the self-indicating grade will be ready for reuse, when its original colour has returned.

silica gels uses a small concentration between 0.5 and 1.0% weight for weight of moisture sensitive cobalt chloride indicator, which gives a blue silica gel. This changes to pink as it adsorbs moisture and becomes saturated, returning to blue as it is regenerated.

  

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