The Transducer Vent Bellows (TVB1) shall be used to replace desiccant protection for a submersible transducer vent tube against the entry of moisture. The bellows/moisture barrier shall allow normal atmospheric pressure changes to be transmitted to the transducer element without letting moisture latent air into the vent tube. A small hose shall be used to connect the TVB1 unit to the transducer vent tube of the submersible transducer.