Combined Form Thermohydrometer

The Robinson Thermohydrometers’ precision grade design meets API oil testing specifications and is calibrated to API scale Modulus 141.5 at 60°F. The hydrometers are constructed with a solid alloy ballast and are designed to permit quick penetration to the setting point, creating no air bubbles. Each hydrometer incorporates a built-in thermometer for convenience when testing samples.

All hydrometers can be certified upon request. Thermohydrometers are certified at three points on the gravity scale as specified by NIST (formerly NBS). Each certified instrument is accompanied by a document of certification that includes the correction of each point tested.

Details & Specs

Specs

Part #

Hydrometer Length (in)

API Gravity Range

Division

Temperature Range (°F)

ASTM

403A021

15

-1 to 11

0.1

0 to 150

51HL

403A022

15

9 to 21

0.1

0 to 150

52HL

403A023

15

19 to 31

0.1

0 to 150

53HL

403A024

15

29 to 41

0.1

0 to 150

54HL

403A025

15

39 to 51

0.1

0 to 150

55HL

403A026

15

49 to 61

0.1

0 to 150

56HL

403A027

15

59 to 71

0.1

0 to 150

57HL

403A028

15

69 to 81

0.1

0 to 150

58HL

403A029

15

79 to 91

0.1

0 to 150

59HL

403A030

15

89 to 101

0.1

0 to 150

60HL

403A032

15

29 to 45

0.2

0 to 150

403A033

15

10 to 30

0.2

0 to 150

403A034

15

20 to 40

0.2

0 to 150

403A035

15

30 to 50

0.2

0 to 150

403A036

15

40 to 60

0.2

0 to 150

403A037

15

50 to 70

0.2

0 to 150

403A038

15

60 to 80

0.2

0 to 150

403A039

15

70 to 90

0.2

0 to 150

403A040

15

80 to 100

0.2

0 to 150

403A041

15

10 to 45

0.5

0 to 150

403A042

15

45 to 90

0.5

0 to 150

403A043

15

30 to 90

1.0

0 to 150

403A045

15

-1 to 11

0.1

30 to 220

403A046

15

9 to 21

0.1

30 to 220

403A047

15

19 to 31

0.1

30 to 220

403A048

15

29 to 41

0.1

30 to 220

403A049

15

39 to 51

0.1

30 to 220

403A050

15

49 to 61

0.1

30 to 220

403A051

15

59 to 71

0.1

30 to 220

403A052

15

69 to 81

0.1

30 to 220

403A053

15

79 to 91

0.1

30 to 220

403A063

8

-1 to 11

0.2

20 to 130

403A064

8

9 to 21

0.2

20 to 130

403A065

8

19 to 31

0.2

20 to 130

403A066

8

29 to 541

0.2

20 to 130

403A067

8

39 to 51

0.2

20 to 130

403A068

8

49 to 61

0.2

20 to 130

403A069

8

59 to 71

0.2

20 to 130

403A070

8

69 to 81

0.2

20 to 130

and more...