The use of a desiccant container for attaching to the vent tube to prevent moisture in the air from entering the vent tube shall not be considered equal. Desiccant type devices must be periodically replaced or serviced to remain effective.
Ceramic vent filters attached to the vent tube shall not be considered equal. The ceramic filter devices block water as a liquid from entering the vent tube, but they do not block water vapor.
Without adequate protection of the vent tube, moisture from warm air will enter the vent tube and migrate down to the transducer body. As the transducer body is typically cooler than the warmer air, the water vapor in the warm air may condense into liquid. The use of the TVB1 Transducer Vent Bellows is the most effective method for preventing moisture intrusion into a submersible transducer.