ASTM E2251-03a
(Specification)Standard Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
Standard Specification for Liquid-in-Glass ASTM Thermometers with Low-Hazard Precision Liquids
SCOPE
1.1 The purpose of this standard is to specify liquid-in-glass ASTM thermometers using low hazard thermometric liquids defined in this standard.
1.2 This standard specifies liquid-in-glass thermometers graduated in degrees Celsius or degrees Fahrenheit that are frequently identified and used in methods under the jurisdiction of the various technical committees within ASTM. The current approved thermometers are listed in Table 1.
1.3 The technical requirements for the thermometric liquids used in the thermometers in are specified in . Tests for conformity to the technical requirements are also found in Annex A1.
Note 1—It has been found by experience that ASTM Thermometers, although developed in general for specific tests, may also be found suitable for other applications, thus precluding the need for new thermometer specifications differing in only minor features. However, it is suggested that technical committees contact E20.05 before choosing a currently designated thermometer for a new method to be sure the thermometer will be suitable for the intended application.
1.4 For full rationale, see Appendix X1.
1.5 This 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 requirements prior to use.
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Designation: E 2251 – 03a
Standard Specification for
Liquid-in-Glass ASTM Thermometers with Low-Hazard
1
Precision Liquids
This standard is issued under the fixed designation E 2251; the number immediately following the designation indicates the year of
original adoption or, in the case of revision, the year of last revision. A number in parentheses indicates the year of last reapproval. A
superscript epsilon (e) indicates an editorial change since the last revision or reapproval.
1. Scope E 563 Practice for Preparation and Use of an Ice-Point Bath
as a Reference Temperature
1.1 The purpose of this standard is to specify liquid-in-glass
ASTM thermometers using low hazard thermometric liquids
3. Terminology
defined in this standard.
3.1 Definitions—The definitions given in Terminology
1.2 This standard specifies liquid-in-glass thermometers
E 344 apply.
graduated in degrees Celsius or degrees Fahrenheit that are
3.2 Definitions of Terms Specific to This Standard:
frequentlyidentifiedandusedinmethodsunderthejurisdiction
3.2.1 bulb length, n—the distance from the bottom of the
of the various technical committees withinASTM. The current
bulb to the junction of the bulb and the stem tubing.
approved thermometers are listed in Table 1.
3.2.2 contraction chamber, n—an enlargement of the cap-
1.3 The technical requirements for the thermometric liquids
illary, located below the main scale or between the main scale
used in the thermometers in Table 1 are specified inAnnexA1.
and the auxiliary scale, that serves to reduce the scale length or
Tests for conformity to the technical requirements are also
to prevent contraction of all the liquid column into the bulb.
found in Annex A1.
3.2.3 diameter, n—the largest outside dimension of the
NOTE 1—It has been found by experience that ASTM Thermometers,
glass tubing as measured with a ring gage.
although developed in general for specific tests, may also be found
3.2.4 expansion chamber, n—an enlargement at the top of
suitable for other applications, thus precluding the need for new thermom-
the capillary to provide protection against breakage caused by
eter specifications differing in only minor features. However, it is
excessive gas pressure.
suggested that technical committees contact E20.05 before choosing a
3.2.5 faden thermometer, n—a thermometer with a long,
currently designated thermometer for a new method to be sure the
thermometer will be suitable for the intended application.
thin bulb used to determine emergent stem temperatures.
3.2.6 interval error, n—the deviation of the nominal value
1.4 For full rationale, see Appendix X1.
of a temperature interval from its true value; either for the total
1.5 This standard does not purport to address all of the
range (total interval) or for a part of the range (partial interval).
safety concerns, if any, associated with its use. It is the
3.2.7 low-hazard liquid, n—a liquid that is biodegradable,
responsibility of the user of this standard to establish appro-
non-hazardous and considered non-toxic in thermometer quan-
priate safety and health practices and determine the applica-
tities.
bility of regulatory requirements prior to use.
NOTE 2—It is the responsibility of the manufacturer to determine the
2. Referenced Documents
suitability of a liquid for this standard. In marking the thermometer with
2.1 ASTM Standards: theASTMdesignationthemanufacturerisconfirmingthattheliquidinthe
thermometer is non-hazardous as defined by current OSHA(Occupational
E 1 Specification for ASTM Thermometers
Safety and Health Administration) standards and non-toxic in thermom-
E 77 Test Method for Inspection and Verification of Ther-
eter quantities per current definitions of the United States Environmental
mometers
Protection Agency.
E 344 Terminology Relating to Thermometry and Hydrom-
3.2.8 thermometric liquid, n—the liquid in a liquid-in-glass
etry
thermometer that indicates the value of temperature.
3.2.9 top of the thermometer, n—the top of the finished
1
This specification is under the jurisdiction of ASTM Committee E20 on instrument.
Temperature Measurement and is the direct responsibility of Subcommittee E20.05
3.2.10 total length, n—the distance from the bottom of the
on Liquid-in-Glass Thermometers and Hydrometers.
bulb to the top of the finished thermometer, including any
Current edition approved Nov. 1, 2003. Published Novmeber 2003. Originally
special finish at the top.
approved in 2003. Last previous edition approved in 2003 as E 2251–03.
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959, United States.
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E 2251 – 03a
3.3 Other terms may be found in the Terminology sections 8.1.1 A 13-mm length of unchanged capillary between the
of Specification E 1 and Test Method E 77. bulb and the i
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