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API and Thermo-hydrometers

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.

Sample Thermohydrometer Certificate

Uncalibrated
Cat No API Range Div
500-004 -1 to 11 0.2
500-006 9 to 21 0.2
500-008 19 to 31 0.2
500-010 29 to 41 0.2
500-012 39 to 51 0.2
500-014 49 to 61 0.2
500-016 59 to 71 0.2
500-018 69 to 81 0.2
500-920 79 to 91 0.2
500-022 89 to l0l 0.2
Calibrated
Cat No API Range Div Certified at
500-004-C -1 to 11 0.2 0, 5, 10 API
500-006-C 9 to 21 0.2 10, 15, 20 API
500-008-C 19 to 31 0.2 20, 25, 30 API
500-010-C 29 to 41 0.2 30, 35, 40 API
500-012-C 39 to 51 0.2 40, 45, 50 API
500-014-C 49 to 61 0.2 50, 55, 60 API
500-016-C 59 to 71 0.2 60, 65, 70 API
500-018-C 69 to 81 0.2 70, 75, 80 API
500-920-C 79 to 91 0.2 80, 85, 90 API
500-022-C 89 to l0l 0.2 90, 93API

Short Form 7-1/2” Thermo-Hydrometers

Approximately 190mm (7-1/2″) Length. Thermometer in body. Not ASTM designated, but made to similiar specfications. 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

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

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