This h-b instrument durac isopropyl hydrometer measures percent by volume of isopropyl alcohol. The 260mm (4in) hydrometer has a range of 0 to 50 and features readings in 1 division. Hydrometer is individually serialized and features a metal ballast. Hydrometer includes a multi-language (english, french, german, italian, portuguese and spanish) statement of accuracy indicating accuracy traceable to nist and dkd/ptb. Each hydrometer is tested and calibrated in an exclusive triple accredited/registered iso/iec 17025: 2005, a2la accredited laboratory against equipment whose calibration is traceable to nist and dkd/ptb. Has a temperature of standardization 20ãâ°c/20ãâ°c. Range: 0 to 50. Divisions: 1. Length: 260mm (4in). Accuracy: 1% by volume. Per each. Hb instrument #: 50850.