Product Details
Kimble® Kimax® pycnometers are designed for measuring and comparing the densities or specific gravities of liquids and solids. The 15123 series thermometers are mercury-filled, supplied with a standard taper 10/18 thermometer with a range of 14 to 38 degrees C in 0.2 degree increments. The thermometer is retested for accuracy within ± 0.2 degrees C. The standard taper 5/12 side tube cap features a small vent near the top, and the body is conical for maximum stability. The capacity is within 10 percent of the nominal shown on the flask, and each flask body is numbered for ready identification. The 50mL size may be used to obtain the specific gravity of pigments (ASTM D153) and is manufactured from 33 expansion, low extractable borosilicate glass conforming to USP type I and ASTM E438, type I, class A requirements. The procedure for using the 15123R and 15123N bottles requires thorough cleaning, drying, assembly, and weighing of the empty pycnometer before filling it with recently boiled distilled water at a temperature a degree or two below the determination temperature. The thermometer should be inserted into the bottle, forcing water through the overflow tube, and then placed in a constant temperature bath. Once the desired temperature is reached, excess water from the overflow tube tip should be wiped off, after which the pycnometer is removed, wiped dry, and reweighed. The weight difference corresponds to the water in the flask, allowing for volume calculation, and the process is repeated with a liquid of unknown specific gravity. The specific gravity is calculated using the formula: Specific gravity = (weight of liquid of unknown S.G.) / (weight of water at same temperature). Caution is advised when handling the product, as it contains mercury, which can evaporate and become an invisible, odorless toxic vapor. Proper disposal or recycling of mercury-containing items must comply with state and local laws.
