A. P. I. Hydrometers
(combined form)

The American Petroleum Institute; the United States Bureau of Mines, and the National Institute of Standards and Technology selected the API scale in 1921 as the standard for petroleum products in the United States. The following ASTM hydrometers are also used in many other applications and procedures set forth by ASTM, all are calibrated at 60°F

API, ASTM Hydrometers, Combined Form
(With Thermometer)

API COMBINED FORM, THERMOMETER IN STEM, 0.1 DEGREE DIVISIONS, RANGE 30 to 220° F, LENGTH 380 mm.
CAT.#	ASTM#	RANGE
2071H	71H	-1 to 11°
2072H	72H	9 to 21°
2073H	73H	19 to 31°
2074H	74H	29 to 41°

LIQUID PETROLEUM GAS, SPECIFIC GRAVITY, COMBINED FORM, THERMOMETER IN BODY, RANGE 30 TO 90 F, LENGTH 380 mm
CAT.#	ASTM#	RANGE	DIVISION
2101H	101H	0.500 to 0.650	0.001

ASTM DENSITY, KG/M3, COMBINED FORM, DIVISION 0.5, TEMPERATURE STANDARD 15°C, LENGTH 330 mm, THERMOMETER IN BODY, RANGE -20 TO 65°C
CAT.#	ASTM#	RANGE
2300H	300H	600 to 650
2301H	301H	650 to 700
2302H	302H	700 to 750
2303H	303H	750 to 800
2304H	304H	800 to 850
2305H	305H	850 to 900
2306H	306H	900 to 950
2307H	307H	950 to 1000
2308H	308H	1000 to 1050
2309H	309H	1050 to 1100

 

APl, COMBINED FORM, LENGTH 7.5", DIVISION 0.5° THERMOMETER IN BODY, RANGE 20 TO 130°F
CAT.#	RANGE
3000	10 to 50°
3001	25 to 65°
3002	40 to 80°
3003	80 to 120°

API COMBINED FORM, THERMOMETER IN BODY, RANGE  0 to 150° F, LENGTH Approx. 15"
CAT.#	DIV.	RANGE
4000	2°	10 to 40
4001	1°	29 to 45
4002	2°	30 to 60
4003	2°	50 to 80
4004	2°	80 to 110

APl, COMBINED FORM, LENGTH 7.5", THERMOMETER IN BODY, RANGE 20 TO 130°F
CAT.#	RANGE	DIVISION
5000	10 to 45°	1.0°
5001	45 to 90°	1.0°
5002	10 to 30°	0.5°
5003	20 to 40°	0.5°
5004	30 to 50°	0.5°
5005	40 to 60°	0.5°
5006	50 to 70°	0.5°
5007	60 to 80°	0.5°
5008	70 to 90°	0.5°
5009	80 to 100°	0.5°

APl, COMBINED FORM, THERMOMETER IN BODY, THERMOMETER RANGE  0 TO 150°F, LENGTH 7.5"
CAT.#	RANGE	DIV.
2500C	10 to 45°	1.0°
2501C	-1 to 11°	0.2°
2502C	9 to 21°	0.2°
2503C	19 to 31°	0.2°
2504C	29 to 41°	0.2°
2505C	39 to 51°	0.2°
2506C	49 to 61°	0.2°
2507C	59 to 71°	0.2°
2508C	69 to 81°	0.2°
2509C	79 to 91°	0.2°

APl, COMBINED FORM, LENGTH 15", THERMOMETER IN BODY, RANGE  0 TO 150°F
CAT.#	RANGE	DIVISION
6000	10 to 45°	0.5°
6001	45 to 90°	0.5°
6002	10 to 30°	0.2°
6003	20 to 40°	0.2°
6004	30 to 50°	0.2°
6005	40 to 60°	0.2°
6006	50 to 70°	0.2°
6007	60 to 80°	0.2°
6008	70 to 90°	0.2°
6009	80 to 100°	0.2°

Barnstead/ERTCO Thermometers