| Silica Gel | Desiccant Bags | Requirements | Molecular Sieves | Activated Alumina | Humidity Indicator Cards | Aluminum Air Dryers
| Non-Indicating Silica Gel | Indicating Silica Gel (Blue) | Indicating Silica Gel (Orange)
Indicating silica gel is a blue silica gel that gradually changes from a deep blue in the activated condition to a pale pink in the saturated condition. Each color corresponds to a definite relative humidity. It can be reactivated by heating at 250-450 oF, in a clean atmosphere until it becomes blue again. It meets the requirements of Military Specification Mil-D-3716, Type IV, Grade H (High Adsorption Capacity).
Indicating silica gel is widely used as a relative humidity indicator in dehydrated packages or air drying equipments. It is used as a combination desiccant-relative humidity indicator.
Property Name | Property Value |
---|---|
Particle Shape | Granular or Beaded |
Particle Sizes Granular Beaded | 3-8 Mesh / 6-12 mesh / 6-16 Mesh 4-8 Mesh |
Nominal Pore Size | 22 Angstroms |
Pore Volume, cm3/gm | 0.43 Avg. |
Surface Area, m2/gm | 750-800 |
Bulk Density, lbs/ft3 | 45 Avg. |
Moisture Adsorption at 25 oC 10% RH 20% RH 40% RH 60% RH 80% RH | 6.85 Avg. 11.84 Avg. 24.61 Avg. 36.20 Avg. 39.91 Avg. |
Color | Blue (Activated) / Pink (Saturated) |
Moh's Hardness | 5 |
Recommended Reactivation Temperature (oF) | 250-450 |
1-1/2 Lb Can / 5 Lb Can / 30 Lb Pail / 150 Lb Drum
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