Patent ID: 8511173

Claim:
A displacement transducer device, having a main body, a medium and a volume compensation section, wherein the main body has a containment space for holding the medium inside; the medium is contained inside the containment space, and the medium is further comprised of a fluid having a positive coefficient of thermal expansion and movable bodies having a negative coefficient of thermal expansion, wherein the movable bodies are constructed to displace in accordance with movement of the fluid; the medium further comprises a first movable surface and a second movable surface; the first movable surface constitutes part of a surface of the medium; the second movable surface constitutes another part of a surface of the medium; surface area of the second movable surface is larger than surface area of the first movable surface; displacement in one of the first movable surface or the second movable surface is transmitted via the medium to the other of the first movable surface or the second movable surface; the volume compensation section is made from a material having a negative coefficient of thermal expansion; the volume compensation section is arranged adjacent to the medium; and wherein the volume compensation section has a block shape having larger volume than the movable bodies.