Specific viscosity units11/23/2023 ![]() Temperature Choose the actual unit of temperature:Īir density and specific weight at atmospheric pressure:Īir density at ambient temperature and pressure:Īir density at varying pressure and temperature:Īir density at gas-liquid equilibrium pressure:Īir thermal expansion coefficient at atmospheric pressure:ĭensity, specific weight and thermal expansion coefficient of air at 1 atmosphere pressure, at temperatures given as ☏:įor full table specific weight and thermal expansion coefficient - rotate the screen! Temperatureĭensity and specific weight of air at 1 atmosphere pressure, at temperatures given as ☌: Specific weight is given as N/m 3 and lb f/ ft 3. The output density is given as kg/m 3, lb/ft 3, lb/gal(US liq) and sl/ft 3. The calculator below can be used to calculate the air density and specific weight at given temperatures and atmospheric pressure. See also Air Composition and molecular weight, Density at varying pressure, Diffusion Coefficients for Gases in Air, Dynamic (absolute) and kinematic viscosity, Prandtl Number, Specific heat at varying temperature and Specific heat at varying pressure, Thermal Conductivity, Thermal Diffusivity, Properties at gas-liquid equilibrium conditions and Air thermophysical properties, for other properties of air.įor other substances, see Density and specific weight o f acetone, ammonia, argon, benzene, butane, carbon dioxide, carbon monoxide, ethane, ethanol, ethylene, helium, hydrogen, methane, methanol, nitrogen, oxygen, pentane, propane, toluene and water, as well as Density of crude oil, Density of fuel oils, Density of lubricating oil and Density of jet fuel as function of temperature. At the bottom of the page there are some examples of calculations using hot and cold air. Tabulated values and density units conversion are given below the figures. G = acceleration due to gravity, units typically and value on Earth usually given as 9.80665 m/s 2 or 32.17405 ft/s 2 Specific weight is the ratio of the weight to the volume of a substance: At EAG Laboratories, many of our viscometers offer select or programmed temperature control, which affords viscosity testing at constant specified temperatures.Density is the ratio of the mass to the volume of a substance: The more elevated the temperature, the more readily the material flows, which results in a lower measured viscosity compared to ambient or sub-ambient conditions. With all viscosity techniques, temperature can greatly impact the results of testing. Common test methods for kinematic viscosity include ASTM D4212, ASTM D1200 and ASTM D445. Intrinsic viscosity is normally performed using the Ubbelohde viscometer.ĭepending on the equipment used, kinematic viscosity can be reported in units of meters squared per second, stokes, centistokes or time in seconds. Intrinsic viscosity is an important technique for characterizing polymers in dilute solution, because it provides information related to molecular weight and the conformational shape of a specific polymer in a chosen solvent. Therefore, the typical applications for capillary viscometers include: dilute polymer solutions, certain types of solvents, dilute solutions, syrups and oils. The capillary geometry is too small for highly viscous samples. The Ubbelohde and Cannon-Fenske viscometers utilize a glass capillary through which the fluid flows under gravity. ![]() The cup-type viscometers are typically used for paints, inks, varnishes and highly viscous coatings. Common ASTM test methods for dynamic viscosity include ASTM D4287, ASTM D562 and ASTM D2196.ĮAG Laboratories performs kinematic viscosity measurements using the following viscometers: Depending on the equipment used, viscosity data can be reported in units of centipoise, poise, Pascal-seconds or Krebs units. The instruments contain a calibrated spring that measures the fluid’s resistance to the movement. ![]() Rotational viscometers of various torque ranges manufactured by Brookfield Engineering Corp.įor all of these instrument types, a cone, spindle or paddle is placed in contact with the test fluid and is rotated at a programmed shear rate.Krebs spindle viscometer (KU meter) for paints, pigmented coatings, pastes and adhesives.High shear rate viscometer for paints and pigmented coatings, also known as an ICI viscometer. ![]()
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