Hydrometer, ASTM 4H-FC, 29/41, API, Glas Formerly

HB Instruments Hydrometer, API, 29 to 41° Range, 0.1 Division, 330mm L, ASTM No. 4H, 0.1° Accuracy, 60°F Standardizing Temperature, Individually Serialized, Feature Metal Ballast, Certified at 30, 35, 40°, 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