Indicating silica gel is very similar with normal silica gel beads, but it is chemically inert and the color-changing ability to indicate the amount of moisture it already absorbed. Indicating silica gel is used throughout the power generation and transmission industry for Transformer Breathers to protect the heat transfer cooling oil from moisture (condensed water) contamination. One of the principal reasons for the use of Indicating silica gel is its ability to release adsorbed moisture when heated to a temperature of over 100oC. This means it can recovered and used again. Indicating silica gel can theoretically be reactivated a number of times.
Indicating silica gel
Blue silica gel
Blue Silica Gel has the appearance of the blue or light blue glass-like particles, according to the shape of particles .It can be divided into spherical ones and block ones. Meanwhile, It has a property of turning pink from blue after absorption….
Orange silica gel
Orange silica gel is the indicating silica gel which changes its color from orange to pink or green when it takes up moisture. Its main component is silicon dioxide and it is now rapidly replace blue silica gel because of its non-toxic…
How to choose indicating silicone? Is orange or blue silica gel better?
Blue silica indicating gel
Blue silica indicating gel beads are washed with cobalt chloride, which gives the granule its blue color. As the silica gel becomes saturated with water, the color turns pink. Because blue silica gel contains a small amount of cobalt chloride, it is toxic and should be avoided from contact with food and inhalation. Blue silica indicating gel has similar applications to the orange variety, but should not be used in products that are intended for consumption, such as food, beverages, and pharmaceutical products.
Orange silica indicating gel
Orange silica indicating gel is an updated product of blue silica gel.Orange silica gel does not contain cobalt chloride, so some people call it cobalt-free silica gel.