| http://www.w3.org/ns/prov#value | - In FIG. 1, a prior art device 10 is shown constructed of a single piece of silicon 11 cemented to a Pyrex (or other glass or similar material) port tube 12 containing port 13 which provides access to the diaphragm 14 for the fluid being measured or tested, such as ambient air, silicone oil or other relevant fluid.
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