They are used in applications where the variable to be measured cannot tolerate direct contact with the sensor. The maximum recommended temperature limit is approximately 3400 deg. F. for the Radiamatic and 5000 deg F. for the Rayotube. The Rayotube also provides somewhat greater speed of response. Both sensors are available with various mounting arrangements including both water and air cooled fittings.
Selection is contingent upon size of target and distance of the sensor from the target.
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