Durac 19/31 API ASTM Certified Hydrometer
Measure density according to API degree scale for petroleum applications. Supplied with a detailed laminated Calibration Report stating corrections to one-tenth of the smallest division. Hydrometers are individually serialized, 330mm (13″) long and feature a metal ballast. Individually packaged in a recyclable deluxe storage box. Tested and calibrated in our exclusive triple accredited/registered ISO/IEC 17025:2005, A2LA accredited laboratory against equipment whose calibration is traceable to NIST and DAkkS. Temperature of Standardization 60°F/60°F. After manufacture each hydrometer is hand inspected by our U.S. quality team.
