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APG Desiccant Cartridge for Breathing Tube on PT-500 Submersible Transducer, Comes with Tubing Adapters. This cartridge absorbs any moisture in the vent tube to keep vapor from condensing. The installation of the desiccant drying cartridge is quick and easy. Common in stallation methods are cable tie, Velcro, and cable clamps.
Note: Desiccant crystals change from blue to pink as they become saturated. Cartridge must be replaced when all crystals have saturated. Important: Do NOT use desiccant cartridge in the presence of vapors of liquids containing phosphate esters, synthetic lubricant, hydrocarbon solvents, methanol, acetone, lacquer solvents, or other organics.