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| Koehler |
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Density, Relative
Density (Specific Gravity), or API Gravity - Hydrometers and
Thermohydrometers |
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ASTM
Hydrometers and Thermohydrometers
For density, relative density (specific gravity) or API gravity
determination of crude petroleum, liquid petroleum products and
mixtures of petroleum and non-petroleum products. For density of LPG
and light hydrocarbons refer to K26150.
Calibrated hydrometers and
thermohydrometers are available from Koehler with an ISO/IEC 17025 and
ANSI/NCSL Z-540-1 Report of Calibration.
When inquiring about calibrated hydrometers
and thermohydrometers, please refer to the catalog number for the
corresponding hydrometer or thermohydrometer and replace the middle
three zeros in the catalog number with 004. Example: 251-000-01H API
Gravity Hydrometer would be 251-004-01H Certified API Gravity
Hydrometer.
Specifications
Conforming to the specifications of: ASTM E100
Applicable Test Method Standards
ASTM D287, D1298, D6074, D6158; API MPMS Chapter 9.1; IP 160; ISO 3675;
DIN 51757 |
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API
Gravity Hydrometers
Standard temperature 60°F, subdivisions 0.1° API,
length 330mm |
Catalog
Number |
ASTM
Hydrometer No. |
Nominal
API Gravity Range,
deg. |
| 251-000-01H |
1H |
–1
to +11 |
| 251-000-02H |
2H |
9
to 21 |
| 251-000-03H |
3H |
19
to 31 |
| 251-000-04H |
4H |
29
to 41 |
| 251-000-05H |
5H |
39
to 51 |
| 251-000-06H |
6H |
49
to 61 |
| 251-000-07H |
7H |
59
to 71 |
| 251-000-08H |
8H |
69
to 81 |
| 251-000-09H |
9H |
79
to 91 |
| 251-000-10H |
10H |
89
to 101 |
Specific
Gravity Hydrometers
Standard temperature 60/60°F, subdivisions 0.0005, length 330mm |
Catalog
Number |
ASTM
Hydrometer No. |
Nominal
Specific Gravity Range |
| 251-000-82H |
82H |
0.650
to 0.700 |
| 251-000-83H |
83H |
0.700
to 0.750 |
| 251-000-84H |
84H |
0.750
to 0.800 |
| 251-000-85H |
85H |
0.800
to 0.850 |
| 251-000-86H |
86H |
0.850
to 0.900 |
| 251-000-87H |
87H |
0.900
to 0.950 |
| 251-000-88H |
88H |
0.950
to 1.000 |
| 251-000-89H |
89H |
1.000
to 1.050 |
| 251-000-90H |
90H |
1.050
to 1.100 |
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API
Gravity Hydrometers
Standard temperature 60°F, subdivisions, 0.1° API,
length 330mm |
Catalog
Number |
ASTM
Hydrometer No. |
Nominal
API Gravity Range, deg. |
| 251-000-21H |
21H |
0
to 6 |
| 251-000-22H |
22H |
5
to 11 |
| 251-000-23H |
23H |
10
to 16 |
| 251-000-24H |
24H |
15
to 21 |
| 251-000-25H |
25H |
20
to 26 |
| 251-000-26H
|
26H |
25
to 31 |
| 251-000-27H |
27H |
30
to 36 |
| 251-000-28H |
28H |
35
to 41 |
| 251-000-29H |
29H |
40
to 46 |
| 251-000-30H |
30H |
45
to 51 |
| 251-000-31H |
31H |
50
to 56 |
| 251-000-32H |
32H |
55
to 61 |
| 251-000-33H |
33H |
60
to 66 |
| 251-000-34H |
34H |
65
to 71 |
| 251-000-35H |
35H |
70
to 76 |
| 251-000-36H |
36H |
75
to 81 |
| 251-000-37H |
37H |
80
to 86 |
| 251-000-38H |
38H |
85
to 91 |
| 251-000-39H |
39H |
90
to 96 |
| 251-000-40H |
40H |
95
to 101 |
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API
Gravity Thermohydrometers - Thermometer in Body
Standard temperature 60°F, subdivisions 0.1° API,
length 380mm, thermometer scale °F 0-150 (designation L), 30 to
180 (designation M), 60 to 220 (designation H) |
Catalog
Number |
ASTM
Thermohydrometer No. |
Nominal
API Gravity Range, deg. |
| 251-000-51HH |
51HH |
–1
to 11 |
| 251-000-51HL |
51HL |
–1
to 11 |
| 251-000-52HH |
52HH |
9
to 21 |
| 251-000-52HL |
52HL |
9
to 21 |
| 251-000-53HM |
53HM |
19
to 31 |
| 251-000-53HL |
53HL |
19
to 31 |
| 251-000-54HM |
54HM |
29
to 41 |
| 251-000-54HL |
54HL |
29
to 41 |
| 251-000-55HL |
55HL |
39
to 51 |
| 251-000-56HL |
56HL |
49
to 61 |
| 251-000-57HL |
57HL |
59
to 71 |
| 251-000-58HL |
58HL |
69
to 81 |
| 251-000-59HL |
59HL |
79
to 91 |
| 251-000-60HL |
60HL |
89
to 101 |
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API
Gravity Thermohydrometers Thermometer in Stem
Standard temperature 60°F, subdivisions 0.1° API,
length 380mm, temperature scale °F 30-220 |
Catalog
Number |
ASTM
Thermohydrometer No. |
Nominal
API Gravity Range, deg. |
| 251-000-71H |
71H |
–1
to 11 |
| 251-000-72H |
72H |
9
to 21 |
| 251-000-73H |
73H |
19
to 31 |
| 251-000-74H |
74H |
29
to 41 |
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Specific
Gravity Hydrometers
Standard temperature 60/60°F, subdivisions 0.001 length 260mm |
Catalog
Number |
ASTM
Hydrometer No. |
Nominal
Specific Gravity Range |
| 251-000-102H |
102H |
0.650
to 0.700 |
| 251-000-103H |
103H |
0.700
to 0.750 |
| 251-000-104H |
104H |
0.750
to 0.800 |
| 251-000-105H |
105H |
0.800
to 0.850 |
| 251-000-106H |
106H |
0.850
to 0.900 |
| 251-000-107H |
107H |
0.900
to 0.950 |
| 251-000-108H |
108H |
0.950
to 1.000 |
| 251-000-125H |
125H |
1.000
to 1.050 |
| 251-000-126H |
126H |
1.050
to 1.100 |
| 251-000-127H |
127H |
1.100
to 1.150 |
| 251-000-128H |
128H |
1.150
to 1.200 |
| 251-000-129H |
129H |
1.200
to 1.250 |
| 251-000-130H |
130H |
1.250
to 1.300 |
| 251-000-131H |
131H |
1.300
to 1.350 |
| 251-000-132H |
132H |
1.350
to 1.400 |
| 251-000-133H |
133H |
1.400
to 1.450 |
| 251-000-134H |
134H |
1.450
to 1.500 |
| 251-000-135H |
135H |
1.500
to 1.550 |
| 251-000-136H |
136H |
1.550
to 1.600 |
| 251-000-137H |
137H |
1.600
to 1.650 |
| 251-000-138H |
138H |
1.650
to 1.700 |
| 251-000-139H |
139H |
1.700
to 1.750 |
| 251-000-140H |
140H |
1.750
to 1.800 |
| 251-000-141H |
141H |
1.800
to 1.850 |
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ASTM
Metric Thermohydrometers
Standard temperature 15°C, subdivisions 0.5kg/m3, length 380mm,
thermometer scale °C: –20 to +65 (designation L), 0
to 85 (designation M), 20 to 105 (designation H) |
Catalog
Number |
ASTM
Thermohydrometer No. |
Density,
Range kg/m3 |
| 251-000-300HL |
300HL |
600
to 650 |
| 251-000-301HL |
301HL |
650
to 700 |
| 251-000-302HL |
302HL |
700
to 750 |
| 251-000-302HM |
302HM |
700
to 750 |
| 251-000-303HL |
303HL |
750
to 800 |
| 251-000-303HM |
303HM |
750
to 800 |
| 251-000-304HL |
304HL |
800
to 850 |
| 251-000-304HM |
304HM |
800
to 850 |
| 251-000-305HL |
305HL |
850
to 900 |
| 251-000-305HM |
305HM |
850
to 900 |
| 251-000-306HL |
306HL |
900
to 950 |
| 251-000-306HM |
306HM |
900
to 950 |
| 251-000-307HL |
307HL |
950
to 1000 |
| 251-000-307HH |
307HH |
950
to 1000 |
| 251-000-308HH |
308HH |
1000
to 1050 |
| 251-000-308HL |
308HL |
1000
to 1050 |
| 251-000-309HH |
309HH |
1050
to 1100 |
| 251-000-309HL |
309HL |
1050
to 1100 |
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