Efflux Index Apparatus

Efflux Index Apparatus

Product Code : EL-ATLE-10479

Quick Answer: The Efflux Index Apparatus measures the flow coefficient (efflux index) of fine aggregates, indicating the shape and angularity of the grains, by timing (in seconds) how long a specified volume of aggregate takes to flow through a given funnel opening under standard conditions. It consists of two funnels with different openings, a cylindrical hopper, a metal stand with a shutter, and a metal container, has overall dimensions of 150 x 180 x 410 mm, and a weight capacity of 5 Kg.
The Efflux Index (Flow Coefficient of Fine Aggregates) Apparatus consists of two funnels with different openings, a cylindrical hopper, a metal stand with a shutter, and a metal container, and is used to obtain information about the shape and angularity of grains of fine aggregates. The flow coefficient of an aggregate is the time, expressed in seconds, for a specified volume of aggregate to flow through a given opening under specified conditions using a standard apparatus.
Dimensions (in mm) : 150 x 180 x 410
Weight Capacity : 5 Kg

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Last Updated: September 2026

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