Ογκόμετρο Scott
Ογκόμετρο μεταλλικής σκόνης
Ογκόμετρο χρωστικής βαφής
Φαρμακευτικό Ογκόμετρο
Scott Apparent Density Tester
Δοκιμαστής χύδην πυκνότητας Scott
Μέτρηση Μαζικής Πυκνότητας & Μέτρηση Φαινόμενης Πυκνότητας
ASTM B329 ASTM B873 ISO 3923
USP 616 PH Eur 2.9.34-1

Ογκόμετρο Scott ASTM B328 & ISO 3923 - Application:

ASTM B329 – Apparent Density of Metal Powders Using the Scott Volumeter

ASTM B329 defines a standardized procedure for determining the apparent density of metal powders using the Scott Volumeter, a precision instrument designed to create a reproducible packing condition. The method is based on the principle that powder passing through a series of four baffle plates and a standardized square funnel will settle into a receiving cup with a consistent packing structure, minimizing operator‑dependent variability.

The test begins by allowing a free‑flowing metal powder to discharge through the Scott Volumeter’s baffle system under gravity. As the powder cascades through the baffles, particle orientation, velocity, and packing behavior become standardized. The powder then fills a 25cm³ receiving cup of fixed geometry. After leveling the excess material, the mass of the filled cup is measured using a laboratory balance.

ο apparent density (g/cm³) is calculated as the mass of powder divided by the known 25 cm³ volume. This value provides insight into particle morphology, surface texture, flowability, and packing efficiency - all critical parameters in powder metallurgy, additive manufacturing feedstock qualification, and sintering behavior prediction.

ASTM B329 is widely used for quality control, batch comparison, supplier qualification, and material specification compliance.

ISO 3923‑2 – Metallic Powders: Determination of Apparent Density Using the Scott Volumeter

ISO 3923‑2 is the international equivalent to ASTM B329 and specifies the determination of apparent density for metallic powders using the Scott Volumeter method. The standard ensures global consistency in powder characterization by defining strict dimensional tolerances for the funnel, baffle plates, and receiving cup, as well as environmental and procedural controls.

In this method, the powder flows through a multi‑stage baffle assembly designed to break agglomerates, reduce particle momentum, and promote uniform packing. The geometry of the baffles and the funnel ensures that powders with different particle shapes — spherical, irregular, dendritic, or sponge‑like — settle in a reproducible manner.

The powder fills a 25 cm³ Κύπελλο πυκνότητας, which is then leveled and weighed. The resulting apparent density reflects the powder’s ability to pack under low‑energy conditions, making it a sensitive indicator of:

• particle size distribution
• particle shape and surface roughness
• internal porosity
• flowability and cohesiveness
• powder conditioning or degradation

ISO 3923‑2 is used extensively in international supply chains, research laboratories and industries where powder performance directly affects process stability including MIM, PM compaction, AM powder bed fusion and thermal spray feedstock evaluation.