Sensor and Instrument Coolers, Cryostats and Dewars

Sensor coolers, iinstrument coolers, cryostats and dewars enhance sensitivity or allow sensors to function in demanding, high-temperature environments. Products include water-cooled sensor jackets. A cryostat is an apparatus that is used to maintain a constant low temperature and utilizes vacuum space and other various methods for intercepting heat to a superconducting magnet. A water-cooled sensor jacket is used where the cooling water system is employed to indicate abnormal engine temperature. There are many types of a cryostat. Examples include liquid cryogen-free systems and dewars. Liquid cryogen-free systems use a superconducting magnet system, which is cooled to 4.2K without using liquid cryogens. Liquid cryogen-free systems are used at places where transferring of liquid cryogens is difficult. A Dewar provides superior thermal performance because it combines advanced vacuum design and multiple layers of super-insulation technology. Other sensor coolers, instrument coolers, cryostats and dewars are commonly available.

There are several ways in which sensor coolers, instrument coolers, cryostats, and dewars function.. A sensor instrument cooler uses a cryostat which employs a pump-out port for vacuum space and safety overpressure devices that protect personnel and equipment in case of vacuum space overpressure. A sensor is mounted on the water-cooled jacket. In a water-cooled sensor jacket a setpoint is adjusted to emit an alarm when the temperature rises above the adjusted temperature. Liquid cryogen-free systems eliminate the liquid cryogen reservoirs and thus its size and weight is reduced. A Dewar flask is commonly used. A Dewar flask provides vacuum integrity and tolerance less than .001. Standard magnet Dewars are available with liquid nitrogen shielding, belly sections, and helium-vapor shielding. Sensor and instrument instrument coolers, cryostats and dewars are designed and manufactured to meet most industry specifications.

Sensor coolers, instrument coolers, cryostats and dewars are used in many applications. Examples include infrared detector assemblies, thermal imaging systems, and opto-electronics instrumentation. Sensor coolers, instrument coolers, cryostats and dewars adhere to International Standards Organization (ISO) standards.

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