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Cernox®
Cernox® thin film resistance cryogenic temperature sensors offer significant advantages over comparable bulk or thick film resistance sensors. The smaller package size of these thin film sensors makes them useful in a broader range of experimental mounting schemes, and they are also available in chip form. They are easily mounted in packages designed for excellent heat transfer, yielding a characteristic thermal response time much faster than possible, with bulk devices requiring strain-free mounting. Additionally, Cernox sensors have been proven very stable over repeated thermal cycling and under extended exposure to ionizing radiation.
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Interchangable Rox™
Ruthenium oxide temperature sensors are thick-film resistors, with most models suitable for use in applications involving magnetic fields. These composite sensors consist of bismuth ruthenate, ruthenium oxides, binders, and other compounds that allow them to obtain the necessary temperature and resistance characteristics. Each Lake Shore Rox™ model adheres to a single resistance versus temperature curve.
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Ultra-Low Temperature Rox™
With the amazing progress made by dilution refrigerator manufacturers to push base temperatures well below 10 mK, the need for accurate, simplified temperature measurements continues to grow. The RX-102B-RS meets this need as a resistive temperature device (RTD) that maintains sensitivity well below 10 mK. Building on the success of the previous generation RX-102B, this sensor refines the package to improve thermal connection and adds optical radiation shielding to further reduce the issue of unwanted sensor heating.
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Germanium
Lake Shore germanium resistance temperature sensors are recognized as “Secondary Standard Thermometers” and have been employed in the measurement of temperature from 0.05 K to 30 K for nearly 40 years. Germanium sensors have a useful temperature range of about two orders of magnitude. The exact range depends upon the doping of the germanium element. Cryogenic temperature sensors with ranges from below 0.05 K to 100 K are available. Between 100 K and 300 K, dR/dT changes sign and dR/dT above 100 K is very small for all models. Sensor resistance varies from several ohms at its upper useful temperature to several tens of kilohms at its lower temperature.
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DT-670 Silicon Diodes
DT-670 Series silicon diodes offer better accuracy over a wider temperature range than any previously marketed silicon diodes. Conforming to the Curve DT-670 standard voltage versus temperature response curve, sensors within the DT-670 series are interchangeable, and for many applications do not require individual calibration. DT-670 sensors in the SD package are available in four tolerance bands—three for general cryogenic use across the 1.4 K to 500 K temperature range, and one that offers superior accuracy for applications from 30 K to room temperature. DT-670 sensors also come in a seventh tolerance band, B and E, which are available only as bare die. For applications requiring greater accuracy, DT-670-SD diodes are available with calibration across the full 1.4 K to 500 K temperature range.
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Platinum
Platinum sensor applications PT-100 platinum resistance thermometers (PRTs) serve an important role in both cryogenic research and industrial cryogenics applications. Research Many cryogenic research platforms also include high-temperature capabilities, extending hundreds of degrees above room temperature. These platforms need temperature sensors that can both measure and survive these extreme temperatures. With a useful temperature range of 14 to 873 K, platinum sensors are invaluable for this application. Note: Platinum sensors lose sensitivity below 14 K. For temperatures below this, please see the sensor selection guide as there are sensor options for lower temperatures, though there are none that can also exceed a 500 K maximum temperature.
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Capacitance
CS capacitance sensors are ideally suited for use as cryogenic temperature control sensors in strong magnetic fields because they exhibit virtually no magnetic field dependence. Displacement current is not affected by magnetic fields. Consequently, temperature control fluctuations are kept to a minimum when sweeping magnetic field or when changing field values under constant temperature operation. Because small variations in the capacitance/temperature curves occur upon thermal cycling, calibrations must be transferred to the capacitor from another sensor after cooling for the best accuracy. It is recommended that temperature in zero field be measured with another temperature sensor and that the capacitance sensor be employed as a control element only.
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Thermocouple Wire
Thermocouple wire is used in a variety of cryogenic applications, but special techniques must be employed to approach temperature accuracies of 1% of temperature, even without consideration for the effects of high magnetic fields or high radiation fluxes. The problems are further complicated by exposure to variable gradient conditions at cryogenic temperatures. Many Lake Shore temperature controllers offer inputs that accommodate most common types of cryogenic thermocouple wire in use.
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HR Series Sensors
High reliability sensors The HR Series is a new line of high reliability cryogenic temperature sensors for mission-critical applications. Starting with our proven temperature sensor technology, we have developed a family of off-the-shelf sensors that have already undergone extreme testing stepsto assure you of extra reliability.
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