ASTM E2995-14
(Specification)Standard Specification for ASTM Thermohydrometers with Integral Low-Hazard Thermometers
Standard Specification for ASTM Thermohydrometers with Integral Low-Hazard Thermometers
SCOPE
1.1 This specification covers glass thermohydrometers of various scale graduation systems, intended for use in a variety of ASTM Test Methods.
1.2 The thermohydrometers presented in this standard are not exact replacements for the thermohydrometers in Specification E100; the thermometers have larger maximum permissible scale errors than do their Hg-filled counterparts. The user should decide if these thermohydrometers are appropriate for use in his or her application.
1.3 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 limitations prior to use.
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Designation:E2995 −14
StandardSpecification for
ASTM Thermohydrometers with Integral Low-Hazard
Thermometers
This standard is issued under the fixed designation E2995; 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 (´) indicates an editorial change since the last revision or reapproval.
1. Scope 3. Terminology
3.1 Definitions—The definitions given inTerminology E344
1.1 This specification covers glass thermohydrometers of
apply.
various scale graduation systems, intended for use in a variety
of ASTM Test Methods.
3.2 Definitions of Terms Specific to This Standard:
3.2.1 ledger paper, n—a paper characterized by strength,
1.2 The thermohydrometers presented in this standard are
high tearing resistance, eraseability, water resistance, ink
not exact replacements for the thermohydrometers in Specifi-
receptivity, uniformity of surface, and smoothness.
cation E100; the thermometers have larger maximum permis-
3.2.1.1 Discussion—Originally, ledger paper was used espe-
sible scale errors than do their Hg-filled counterparts. The user
cially for pen and ink records. Most ledger papers are surface
should decide if these thermohydrometers are appropriate for
sized, frequently subjected to appreciable wear, and must have
use in his or her application.
a high degree of permanence and durability.
1.3 This standard does not purport to address all of the
3.2.2 length of the scale, n—length of the nominal range in
safety concerns, if any, associated with its use. It is the
the stem, not including graduations extending above and below
responsibility of the user of this standard to establish appro-
the nominal limits.
priate safety and health practices and determine the applica-
bility of regulatory limitations prior to use. 3.2.3 thermohydrometer, n—glass hydrometer having an
integral thermometer.
2. Referenced Documents
3.2.4 top of the thermohydrometer, n—top of the finished
instrument.
2.1 ASTM Standards:
D287 Test Method for API Gravity of Crude Petroleum and
3.2.5 total length, n—overall length of the finished thermo-
Petroleum Products (Hydrometer Method) hydrometer.
D1250 Guide for Use of the Petroleum Measurement Tables
4. Specifications
D3290 Specification for Bond and Ledger Papers for Perma-
nent Records (Withdrawn 2010) 4.1 Thermohydrometers shall conform to the detailed speci-
fications in Table 1 and to the general requirements specified in
E77 Test Method for Inspection and Verification of Ther-
mometers Sections5–15.
E100 Specification for ASTM Hydrometers
4.2 Thermohydrometers shall conform to the inspection
E126 Test Method for Inspection, Calibration, and Verifica-
criteria found in Section 16 and the calibration and verification
tion of ASTM Hydrometers
criteria found in Section 14.
E344 Terminology Relating to Thermometry and Hydrom-
4.3 Thermohydrometers manufactured to previous revisions
etry
of this specification shall retain the sameASTM status as those
meeting current specifications.
4.4 At time of purchase, scale errors shall not exceed the
This specification is under the jurisdiction of ASTM Committee E20 on
maximum permissible scale error found in Table 1.
Temperature Measurement and is the direct responsibility of Subcommittee E20.05
on Liquid-in-Glass Thermometers and Hydrometers.
NOTE 1—Caution—Users should be aware that both temperature and
Current edition approved Dec. 1, 2014. Published December 2014. DOI:
density indications of thermohydrometers may change with rough
10.1520/E2995-14
2 handling, shock, exposure to aggressive liquids, and thermal cycling,
For referenced ASTM standards, visit the ASTM website, www.astm.org, or
among other factors. Consequently, test results and performance obtained
contact ASTM Customer Service at service@astm.org. For Annual Book of ASTM
at the time of manufacture may not necessarily apply throughout an
Standards volume information, refer to the standard’s Document Summary page on
extended period of use. Periodic calibration or verification of these
the ASTM website.
The last approved version of this historical standard is referenced on instruments, in accordance with procedures set forth in Standard Test
www.astm.org. Method E126, is recommended
Copyright © ASTM International, 100 Barr Harbor Drive, PO Box C700, West Conshohocken, PA 19428-2959. United States
E2995−14
TABLE 1 Specifications for ASTM Thermohydrometers
API Gravity Thermohydrometers
for Petroleum Products and Other Liquids of Similar Surface Tensions (33 dynes/cm or less)
Thermometer Scale in Body
ASTM Thermohydrometer No. Nominal API Gravity Range, deg
S550HL-14 -6 to +6
S551HL-14 -1 to 11
S552HL-14 9to21
S553HL-14 19 to 31
S554HL-14 29 to 41
S555HL-14 39 to 51
S556HL-14 49 to 61
S557HL-14 59 to 71
S558HL-14 69 to 81
S559HL-14 79 to 91
S560HL-14 89 to 101
S561HL-14 37 to 49
S562HL-14 64 to 76
Thermohydrometer Dimensions
Total length, mm 374 to 387
Body diameter, mm 18 to 25
Stem diameter, min, mm 4.0
Hydrometer Scale
Standard temperature, °F 60
Subdivisions, °API 0.1
Intermediate lines at, °API 0.5
Main (numbered) lines at, °API 1.0
Scale error at any point not to exceed, °API 0.1
Length of nominal scale, mm 125 to 145
Thermometer Scale
Range, °F 0to150
Immersion total
Subdivisions, °F 2
Intermediate lines at, °F 10
Main (numbered) lines at, °F 20
Scale error at any point not to exceed, °F 2
Scale length, mm 80 to 110
Density Thermohydrometers
for Petroleum Products and Other Liquids of Similar Surface Tensions (33 dynes/cm or less)
Thermometer Scale in Body
ASTM Thermohydrometer No. Nominal Range, kg/m at 15°C
S500HL-14 600 to 650
S501HL-14 650 to 700
S502HL-14 700 to 750
S503HL-14 750 to 800
S504HL-14 800 to 850
S505HL-14 850 to 900
S506HL-14 900 to 950
S507HL-14 950 to 1000
S508HL-14 1000 to 1050
S509HL-14 1050 to 1100
S510HL-14 775 to 825
Thermohydrometer Dimensions
Total length, mm 374 to 387
Body diameter, mm 18 to 25
Stem diameter, min, mm 4.0
Hydrometer Scale
Standardization temperature, °C 15
Subdivisions, kg/m at 15°C 0.5
Intermediate lines, kg/m at 15°C 1.0
Number lines, kg/m at 15°C 5
Main (numbered) lines, kg/m at 15°C 10
Scale error at any point not to exceed, kg/m at 15°C 0.5
Length of nominal scale, mm 125 to 145
Thermometer Scale
Range, °C -20to65
Immersion total
Subdivisions, °C 1
Intermediate lines at, °C 5
Main (numbered) lines at, °C 10
Scale error at any point not to exceed, °C 1
Scale length, mm 80 to 110
E2995−14
5. Type 5.6 The API thermohydrometers are intended for use in
conjunction withTest Method D287, with hydrometer readings
5.1 Thermohydrometers shall be of the constant mass,
being corrected in accordance with Guide D1250, IP 200.
variable displacement type. Thermohydrometers shall be made
Therefore, these thermohydrometers shall be made of glass
of glass, except for the scale, ballast, cement, and the thermo-
having a cubical coefficient of expansion of approximately
metric liquid of the thermometer.
0.000023/1°C or 0.0000128/1°F.
5.2 The outer surface of the stem and body shall be
symmetrical about the vertical axis. There shall be no uneven
6. Body
or unnecessary thickening of the walls, and no abrupt changes
6.1 The preferred shapes for thermohydrometers in this
or constrictions that would hinder thorough cleaning or tend to
specification is shown in Fig. 1.
trap air bubbles when the instrument is immersed.
7. Ballast
5.3 The thermohydrometer shall float with its axis vertical
in the liquids for which it is intended.
7.1 Material used for ballast shall be secured to the lower
part of the body, with no loose material of any sort inside the
5.4 The thermohydrometer shall be thoroughly dry on the
thermohydrometer. When cement is used to hold the ballast
inside when sealed.The top of the stem shall be neatly rounded
securely in place, this cement shall not soften below 105°C
without unnecessary thickening.
(221°F).
5.5 The glass shall be smooth, transparent, and free of
7.2 If shot is used and sealed with wax, the wax shall not
bubbles, strain patterns, cracks, or other imperfections that
soften below 105°C (221°F)
might interfere with the use of the thermohydrometer. The
glass shall adequately resist the reaction of chemical agents to
8. Stem
which thermohydrometers may be exposed, and also shall have
suitable thermal properties to permit its use over the range of 8.1 The stem shall be uniform in cross section, with no
temperatures to which it may be subjected. In general, glasses perceptible irregularities. It shall extend at least 15 mm above
suitable for constructing the bulbs of thermometers are satis- the top graduation, and remain cylindrical for at least 3 mm
factory for thermohydrometers. below the lowest graduation.
Thermohydrometer with Thermometer in Bod
...
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