HB Instrument Company Precision Specific Gravity Hydrometers. The inside of this precision instrument has been precisely ground and polished to remove any tolerances producing a sample without surface or batch variation. To achieve this delicate balance a stainless steel sliding rest and precision weight retention system is employed. The zeroing weight and the lanyard are included. The hydrometers are intended for use mainly in laboratories and scientific institutions where high standards of accuracy and precision are demanded. Hydrometer 50490 is particularly suitable for measuring the specific gravity of samples in the lab or other environments where the lab worker may be exposed to high levels of radiation. Specifications for HB Instrument Company Precision Specific Gravity Hydrometers 50490 : Range Specific Gravity: 1.840 to 1.920 Unit: Each (Please note that the description and stock photo may not correspond to the specific model listed above) We offer only genuine HB Instrument Company products authorized for sale in the U.S. and other markets so you can be sure that you are buying authentic Labware & Accessories with a full manufacturer's warranty in addition to our own 100percent Satisfaction Guarantee. We are your premier online distributor for HB Instrument Company Labware & Accessories. We are an authorized supplier to all federal and state government agencies as well as to research and educational institutions and can facilitate volume orders on many types of laboratory equipment lab consumables and other products to help fulfill your specific needs. We offer Free Shipping and FREE USPS shipping to APO and FPO addresses on all orders in our store over 49. Please refer to our APO/FPO Shipping and Export Restrictions for more information on export to APO/FPO addresses. In addition to the HB Instrument Company Precision Specific Gravity Hydrometers 50490/ 34627-650 we carry a full complement of Labware & Accessories as well as other product offerings from HB Instrument Company. We also carry a full line of HB Instrument Company accessories to help meet your laboratory and scientific needs. For a complete selection of HB Instrument Company Labware & Accessories please visit our HB Instrument Company page. For more brand name Labware & Accessories please visit our Labware & Accessories store section. To see our complete line of lab medical industrial and scientific products please see our science and lab equipment online catalog. HB Instrument Company Precision Specific Gravity Hydrometers 50490