Bellows Assembly
Servometer® – PMG, LLC (Cedar Grove, NJ) has introduced an athermalization, or “atherm,” temperature-sensitive bellows assembly. The lightweight assemblies have thin-walled, electrodeposited nickel soldered to custom end pieces. The end pieces are filled with a working fluid and then sealed.
By sealing a specific volume of fluid within a Servometer electrodeposited nickel bellows, the volumetric thermal expansion characteristic of the fluid transforms into a measurable linear movement. This movement can be used as an actuator or calibrated to be read as control data. The process is also reversible due to the low hysteresis of the bellows material.
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