Hydrometer, ASTM 3H-FC, 19/31, API, Glas Formerly

HB Instruments Hydrometer, API, 19 to 31° Range, 0.1 Division, 330mm L, ASTM No. 3H, 0.1° Accuracy, 60°F Standardizing Temperature, Individually Serialized, Feature Metal Ballast, Certified at 20, 25, 30°, Measure density according to API degree scale for petroleum applications, Laminated Calibration Report stating corrections to one-tenth of the smallest division, Tested and Calibrated in Exclusive Triple Accredited/Registered ISO/IEC 17025:2005, A2LA Accredited Laboratory Against Equipment whose Calibration is Traceable to NIST and DAkkS - BEL