Plastic Panel Mounting Desiccators are filled with either Molecular Sieve or Silica Gel to protect electronics, electrical, computer equipment, and telecommunications from corroding and getting contaminated. Incorporated with a humidity indicator, it allows the Plastic Panel Mounting Desiccator to monitor moisture saturation and provides a visual indication when replacement or reactivation of desiccant is needed. When the Silica Gel is fully saturated with moisture, the desiccator changes from blue to pink. Silica Gel can also be reused by heating them at 120ºC or 248ºF for four hours in a ventilated oven. Molecular Sieve, on the other hand, is used to ensure ultra-low relative humidity for extremely sensitive applications. This application includes equipment or enclosure that may be subjected to operation at low temperatures and cannot be in contact with water vapour condensation. However, desiccators filled with Molecular Sieves cannot be reactivated.