Transformer Breather Refill - Silica Gel

3-5mm beaded orange or blue indicating silica gel for PC-TB and Brownell's R series transformer breathers.

Indicating silica gel is ideal in applications where visual control of moisture is required. The silica gel will turn from orange to green or blue to pink as it adsorbs moisture, indicating the need for replacement. Silica gel works by adsorbing and trapping moisture from the air, thus preventing condensation.