Precison ASTM-like combined form hydrometers made to meet ASTM and API specifications, which incorporate a thermometer in the hydrometer stem

The temperature standardization is 60/60F. The hydrometers will perform with the same accuracy as the ASTM hydrometers with mercury thermometers.

The thermometer is made with a non-mercury, blue spirit, has a range of 30 to 220 degrees farenheit and mounted in the hydrometer stem. Length of the hydrometer is 330mm.

Used to measure the density according to API degree scale for petroleum applications.