VEE GEE Scientific 6753HTS Hydrometer, API 19 to 31, ASTM 53H, with Thermometer

Calibrated at 60°F

The API Scale was selected in 1921 by the American Petroleum Institute (API), the U.S. Bureau of Mines, and the National Institute of Standards and Technology (NIST) as the standard hydrometer scale for petroleum products. The API Scale is based on the formula below.

The thermometer scale for Bellwether Hydrometers (w/ Thermometers) is located in the body. A correction scale for conversion of readings to 60°F is printed opposite the temperature scale.

• API Range: 19 to 31°
• Subdivision: 0.1°
• Thermometer Scale (Subdivision: 2°F): 0 to 150°F
• Length: 385 mm