HB Instrument Company Plain Form API Hydrometers ASTM

HB Instrument Company Plain Form API Hydrometers ASTM. The precision-ground stem will not roll or chatter when the hydrometer is set on aqueous solutions. These hydrometers have a large easy-to-read bright yellow glass face a large easy-to-read calibration markings on the stem and are graduated in both mm and mL for quick and accurate readings. Large numerals on the stem identify the type of hydrometer and allow for instant recognition of the type of liquid being measured. Ordering Information: