ASTM E100-03

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Designation: E 100 – 03
Standard Specification for
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ASTM Hydrometers
This standard is issued under the fixed designation E 100; 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.
This standard has been approved for use by agencies of the Department of Defense.
1. Scope 3.2.3 total length, n—the overall length of the finished
hydrometer.
1.1 This specification covers glass hydrometers of various
scale graduation systems, as required by the ASTM Test
4. Specifications
Methods in which they are used.
4.1 Individual hydrometers shall conform to the detailed
1.2 This standard does not purport to address all of the
specifications in Table 1 and to the general requirements
safety concerns, if any, associated with its use. It is the
specified in Sections 5-15.
responsibility of the user of this standard to establish appro-
priate safety and health practices and determine the applica-
NOTE 1—Changes in this specification may be made from time to time
bility of regulatory limitations prior to use. which do not affect the basic characteristics of the hydrometers. Hydrom-
eters manufactured prior to the adoption of the specifications will retain
2. Referenced Documents
the same official status as those meeting current specifications.
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2.1 ASTM Standards:
5. Type
D 287 TestMethodforAPIGravityofCrudePetroleumand
5.1 Hydrometers shall be of the constant-mass, variable-
Petroleum Products (Hydrometer Method)
displacement type. Hydrometers shall be made of glass, except
D 1250 Guide for Petroleum Measurement Tables
for the scale, ballasting material, and the thermometric liquid
E 1 Specification for ASTM Thermometers
of thermohydrometers.
E 77 Test Method for Inspection and Verification of Ther-
5.2 The outer surface of the stem and body shall be
mometers
symmetrical about the vertical axis. There shall be no uneven
E 126 Test Method for Inspection and Verification of Hy-
or unnecessary thickening of the walls, and no abrupt changes
drometers
or constrictions that would hinder thorough cleaning or tend to
E 344 Terminology Relating to Thermometry and Hydrom-
trap air bubbles when the instrument is immersed.
etry
5.3 The hydrometer shall always float with its axis vertical.
3. Terminology 5.4 The hydrometer shall be thoroughly dry on the inside
when sealed. The top of the stem shall be neatly rounded
3.1 Definitions—The definitions given in Terminology
without unnecessary thickening.
E 344 apply.
5.5 The glass shall be smooth, transparent, and free of
3.2 Definitions of Terms Specific to This Standard:
bubbles, striae, or other imperfections that might interfere with
3.2.1 length of the scale, n—the length of the nominal range
the use of the hydrometer. The glass shall adequately resist the
in the stem, not including graduations extending above and
reaction of chemical agents to which hydrometers may be
below the nominal limits.
exposed, and also shall have suitable thermal properties to
3.2.2 top of the hydrometer, n—the top of the finished
permit its use over the range of temperatures to which it may
instrument.
be subjected. In general, glasses suitable for constructing the
bulbs of thermometers are satisfactory for hydrometers.
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This specification is under the jurisdiction of ASTM Committee E20 on 5.6 The API hydrometers are intended to be used in con-
Temperature Measurement and is the direct responsibility of Subcommittee E20.05
junction with Test Method D 287, hydrometer readings being
on Liquid-in-Glass Thermometers and Hydrometers.
corrected using Guide D 1250, IP 200. Therefore, these hy-
Current edition approved Nov. 1, 2003. Published November 2003. Originally
drometersshallbemadeofglasshavingacubicalcoefficientof
approved in 1953. Last previous edition approved in 2001 as E 100 – 95 (2001).
2
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
expansion of approximately 0.000023/1°C or 0.0000128/1°F
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
15.56°C (60°F).
Standards volume information, refer to the standard’s Document Summary page on
the ASTM website.
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E100–03
6. Body may be anchored by a design which prevents it from moving;
otherwise it shall be fixed in place with a cement that will not
6.1 The preferred shapes for the bodies of hydrometers are
soften below 105°C (221°F) and will not deteriorate with time.
shown in Figs. 1 and 2.
The paper shall show no evidence of scorching or charring
7. Balla
...