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standard by ASTM International, 12/01/2014
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1.1This specification covers the requirements for metal-sheathed industrial platinum resistance thermometers (PRTs) suitable for direct immersion temperature measurement. It applies to PRTs with an average temperature coefficient of resistance between 0 and 100C of 0.385%/C and nominal resistance at 0C of 100 or other specified value. This specification covers PRTs suitable for all or part of the temperature range200 to 650C. The resistance-temperature relationship and tolerances are specified as well as physical, performance, and testing requirements.
1.2The values of temperature in this specification are based on the International Temperature Scale of 1990 (ITS-90).2
1.3The values stated in inch-pound units or SI (metric) units may be regarded separately as standard. The values stated in each system are not exact equivalents, and each system shall be independent of the other.
1.4This standard does not purport to address all of the safety concerns, if any, associated with its use. It is the responsibility of the user of this standard to establish appropriate safety and health practices and determine the applicability of regulatory limitations prior to use.