API Chapter 9.3 of the MPMS ASTM D and E100. These instruments combine API gravity scale with a thermometer in the body and are the standard and preferred size normally used for determining the gravity of crude oil and other liquid petroleum products. Length approximately 15 inch (374 to 387 mm), diameter ¾ to 1 inch (18 to 25 mm). Thermometer range is 0 to 150 F
