High-Temperature Sensors

Kaman Precision Products, Measuring Systems

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For precise and noncontact measurement of position and displacement in harsh environments, Kaman Precision Products|Measuring, an operating unit of Kaman Aerospace, is offering a line of high-temperature sensors and systems. The inductive-based displacement sensing systems operate from -196 to 538 °C continuous and up to 649 °C short term. All Inconel construction makes them suitable for use in highly corrosive gas or liquid environments, and in radiation environments.

The extreme sensing systems use a dual-coil sensor design to minimize thermal and radiation effects. The common mode rejection provided by the symmetrical design of the dual coils compensates for constant and slowly changing temperatures from -196 to 25 °C or from 25 to 538 °C. Measurement quality is unaffected by most corrosive gases and liquids and most other environmental contaminants such as oil, dirt, radiation, and stray radio frequency and magnetic fields.

All of the high-temperature transducers are made with sealed all laser-welded Inconel housings and use metal-jacketed, mineral-insulated cable. They use the proprietary KDM-8200 family of signal conditioning electronics. Single- and multiple-channel systems are available in NEMA enclosures or benchtop/ rack-mountable Euro-format enclosures. Options are available with and without power supplies and digital displays.

The sensors were initially designed to measure steam turbine shaft run-out in nuclear power plants. They have also been used to measure nuclear fuel rod vibration, shaft vibration/run-out in rocket engine liquid fuel pumps, chemical processes, research projects and high-temperature processing.

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Published: July 2010