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a small opening in the back. This opening mates with 1/A inch (1/8 

 inch I.D.) flexible teflon tubing which leads to the sensing ports on 

 the pressure transducers inside the water-tight cylinder. The 

 flexible tubing, manufactured by Cajon®, is armored with stainless 

 steel braid. Specifically, it connects to the back of the isolation 

 diaphragm chamber and is fastened to the top of the water-tight 

 cylinder with Swage-Lock® connectors, (Figure III-5) . The connectors 

 penetrate the top of the cylinder and connect to nylon tubing inside. 

 Nylon tubing is used inside the cylinder because of its partial 

 flexibility and transparency. (Nylon is easily impregnated and 

 hardened by seawater and is used outside the cylinder only as a 

 permanent fastener, (Dexter , 1979) .) The nylon tubing is heated and 

 bent to shape to mate with the transducer pressure ports. The 

 housing and tubing assembly is filled with fluid which transmits the 

 deflections of the elastomer to the stainless steel transducer 

 diaphragms. The fluid is dyed with food coloring for ease of 

 identification and inspection for air bubbles that might be seen in 

 the nylon tubing or acrylic housings. 



During assembly, the isolation diaphragm housings are drawn 

 through the arms and secured inside them by brass screws which 

 penetrate the arm walls from the outside. The five isolation 

 diaphragms inside the fuselage fit snugly through three-inch holes in 

 a circular plate positioned just above the spider. A two-inch hole 

 is cut in the center of the plate for ease in assembly. 



