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Home » Products » Hydrometers » API Short Form Hydrometers and Thermo-hydrometers

API Short Form Hydrometers and Thermo-hydrometers

Sample Calibration Certificate

6-1/2″ API Hydrometers

This grouping of hydrometers are not ASTM – but are enormously popular in the same applications as the ASTM 21 through 39H hydrometers. All are 165mm in length, graduated in 0.2 API divisions, and made to the same demanding tolerances as ASTM hydrometers.

Hydrometers With Calibration

Catalog No API Range Div Calibration Test Points
Catalog No
500-004-C		 API Range
-1 to 11		 Div
0.2		 Calibration Test Points
Calibrated @ 0, 5, 10 API
Catalog No
500-006-C		 API Range
9 to 21		 Div
0.2		 Calibration Test Points
Calibrated @ 10, 15, 20 API
Catalog No
500-008-C		 API Range
19 to 31		 Div
0.2		 Calibration Test Points
Calibrated @ 20, 25, 30 API
Catalog No
500-010-C		 API Range
29 to 41		 Div
0.2		 Calibration Test Points
Calibrated @ 30, 35, 40 API
Catalog No
500-012-C		 API Range
39 to 51		 Div
0.2		 Calibration Test Points
Calibrated @ 40, 45, 50 API
Catalog No
500-014-C		 API Range
49 to 61		 Div
0.2		 Calibration Test Points
Calibrated @ 50, 55, 60 API
Catalog No
500-016-C		 API Range
59 to 71		 Div
0.2		 Calibration Test Points
Calibrated @ 60, 65, 70 API
Catalog No
500-018-C		 API Range
69 to 81		 Div
0.2		 Calibration Test Points
Calibrated @ 70, 75, 80 API
Catalog No
500-020-C		 API Range
79 to 91		 Div
0.2		 Calibration Test Points
Calibrated @ 80, 85, 90 API
Catalog No
500-022-C		 API Range
89 to l0l		 Div
0.2		 Calibration Test Points
Calibrated @ 90, 93 API

Hydrometers Without Calibration

Catalog No API Range Div
Catalog No
500-004		 API Range
-1 to 11		 Div
0.2
Catalog No
500-006		 API Range
9 to 21		 Div
0.2
Catalog No
500-008		 API Range
19 to 31		 Div
0.2
Catalog No
500-010		 API Range
29 to 41		 Div
0.2
Catalog No
500-012		 API Range
39 to 51		 Div
0.2
Catalog No
500-014		 API Range
49 to 61		 Div
0.2
Catalog No
500-016		 API Range
59 to 71		 Div
0.2
Catalog No
500-018		 API Range
69 to 81		 Div
0.2
Catalog No
500-020		 API Range
79 to 91		 Div
0.2
Catalog No
500-022		 API Range
89 to l0l		 Div
0.2

Short Form 7-1/2″ Thermo Hydrometers

Approximately 190mm (7-1/2″) Length. Thermometer in body. Not ASTM designated, but made to similar specifications. Popular due to the smaller sample amount (approx 6 ounces) ounces needed to obtain a reading. Made to the same demanding tolerances as ASTM hydrometers. Accuracy: +/- 1 scale division.

Hydrometers With Calibration

Catalog No API Range Div Temp Range Div Length Calibration Test Points
Catalog No
500-100-C		 API Range
-1 to 11		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 0, 5, 10 API
Catalog No
500-102-C		 API Range
9 to 21		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 10, 15, 20 API
Catalog No
500-104-C		 API Range
19 to 31		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 20, 25, 30 API
Catalog No
500-106-C		 API Range
29 to 41		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 30, 35, 40 API
Catalog No
500-108-C		 API Range
39 to 51		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 40, 45, 50 API
Catalog No
500-110-C		 API Range
49 to 61		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 50, 55, 60 API
Catalog No
500-112-C		 API Range
59 to 71		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 60, 65, 70 API
Catalog No
500-114-C		 API Range
69 to 81		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 70, 75, 80 API
Catalog No
500-116-C		 API Range
79 to 91		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 80, 85, 90 API
Catalog No
500-118-C		 API Range
89 to 101		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm		 Calibration Test Points
Calibrated @ 90, 93 API

Hydrometers Without Calibration

Catalog No API Range Div Temp Range Div Length
Catalog No
500-100		 API Range
-1 to 11		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-102		 API Range
9 to 21		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-104		 API Range
19 to 31		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-106		 API Range
29 to 41		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-108		 API Range
39 to 51		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-110		 API Range
49 to 61		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-112		 API Range
59 to 71		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-114		 API Range
69 to 81		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-116		 API Range
79 to 91		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
Catalog No
500-118		 API Range
89 to 101		 Div
0.2		 Temp Range
0 to 130 °F		 Div
2		 Length
190mm
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