・ Heavy bottle (picnometer) habad type referring to JIS R3503.
・ Crude oil and petroleum product -How to find density -Part 3: Suitable for a pycnometer method.
・ The capacity is about 20ml.

■ Measurement method of density using a habar specific gravity (reference to JIS K2249) 1) The mass of the specific gravity and the bottle (M ₀ ) should be applied to the digit of 0.1m. 2) The sample is heated and melted at a low temperature and puts up to about half of the heated specific gravity. 3) After the specific gravity bottle containing the sample is released until it becomes room temperature in the deskkator, the mass (M _M ) is applied to the digit of 0.1m. 4) Newly boiled and cooled at 15 ° C or less in 3), soaked in the specific gravity bottle of 3), soaked in a constant temperature aquarium maintained at 15 ± 0.05 ° C to stabilize the sample temperature. Raise the bubbles to the surface of the water and remove them. 5) When the sample temperature in the specific gravity is stable, insert the plug at 15 ° C in advance in the specific gravity. 6) Wipe off the excess moisture attached to the plug and match the water men's mixture in the tube of the plug to the tap line. 7) Take out the bottle of bottle of plugs from the constant temperature aquarium, rinse the outside, wipe it with a pure cloth and dry. 8) 7) After leaving the specific gravity bottle until it becomes room temperature, the mass (M _f ) is applied to the digit of 0.1m. Calculate the density of the sample in the next equation. d ₁₅ = {(m _m -m 0 ▽) × D ¹⁵ w/(m _w -m _f +m ▽) (15 ° C) (G/CM ³ ) M _M : Mass bottle and plugs with samples (g) m ₀ W: Water density at 15 ° C (0.99910g/cm ³ ) m _w : Heavy bottle at 15 ° C (G) (Jis K2249 8.5 (6)) M _f : sample and water. Mass bottle and bottle of plug (g) C: Correction value for buoyancy of air (G/cm ³ ) (see Table 23)