Efflux Index Apparatus
Product Code : EL-ATLE-10479
Efflux Index Apparatus (code EL-ATLE-10479) is an apparatus for measuring the flow coefficient, or efflux index, of fine aggregates, which gives information about the shape and angularity of the grains. It consists of two funnels with different openings, a cylindrical hopper, a metal stand with a shutter and a metal container, and it has overall dimensions of 150 × 180 × 410 mm and a weight capacity of 5 kg.
Get a quote: use the Add To Cart enquiry button below, or send your quantity and delivery location through the contact page.
Specifications
| Parameter | Detail |
|---|---|
| Use | Flow coefficient (efflux index) of fine aggregates; information on grain shape and angularity |
| Components | Two funnels with different openings, cylindrical hopper, metal stand with shutter, metal container |
| Result | Flow time, in seconds, of a specified volume of aggregate through a given opening under specified conditions |
| Dimensions | 150 × 180 × 410 mm |
| Weight capacity | 5 kg |
| Product code | EL-ATLE-10479 |
| Manufacturer | Engineering Lab Equipment, Ambala, Haryana, India |
What Is the Efflux Index Apparatus Used For?
Sand with rounded grains flows more freely than sand with sharp, angular grains, so the time a fixed quantity takes to run out through an opening is a simple guide to grain shape and angularity. The operator places the hopper and the chosen funnel on the stand with the shutter closed, fills it with the specified volume of fine aggregate, opens the shutter and times the flow into the metal container. The time in seconds is the flow coefficient, and two funnels with different openings are provided.
What to Specify When Ordering
- Quantity — the number of apparatus sets required.
Frequently Asked Questions
What is the efflux index of a fine aggregate?
It is the time, in seconds, that a specified volume of fine aggregate takes to flow through a given opening under specified conditions in a standard apparatus.
What parts does the apparatus include?
It consists of two funnels with different openings, a cylindrical hopper, a metal stand fitted with a shutter, and a metal container to receive the aggregate.
What does a long flow time indicate?
Angular, rough grains interlock and run out more slowly than rounded grains, so a longer flow time points to a more angular fine aggregate.
What are its size and weight capacity?
The apparatus measures 150 × 180 × 410 mm overall and has a weight capacity of 5 kg.
What details help with an export order of the apparatus?
An export enquiry should state the number of sets, the destination country with the port or city, the delivery terms required such as FOB or CIF, packing needs and any tender reference.
OEM Manufacturer
The Efflux Index Apparatus is made by Engineering Lab Equipment (Engineering Labs Equipment Pvt Ltd) at its works at Plot No. 43, Industrial Park, Sector 2, Growth Center, Saha, District Ambala, Haryana, India. The company designs, makes and tests aggregate testing equipment for grading, strength, abrasion and shape tests for engineering colleges, polytechnics, technical training institutes and research laboratories in India and overseas, and can build equipment to an institution's own requirements. Tender and OEM enquiries are handled through the Tenders/OEM page.
Related Aggregate Testing Equipment
- Sand Equivalent Test Set — cased sand equivalent kit with four cylinders, irrigator, siphon, weighted foot and stock solution.
- Shape Index Caliper — 200 mm aggregate shape caliper graduated in 0.05 mm, measuring 450 × 150 × 50 mm.
- Cylindrical Measures — calibrated sheet iron measures with handles, 3 to 30 litres, for aggregate bulk density.
- Density Basket — brass/GI basket with stainless steel mesh, 203 × 203 mm, for weighing aggregate in water.
See the full Aggregate Testing Lab Equipment range or all Civil Engineering Lab Equipment.
Request a Quote
For this and other aggregate testing lab equipment, schools and colleges can contact Engineering Lab Equipment, a manufacturer, supplier and exporter based in Ambala, India. To ask for a quotation, send the number of efflux index sets required and your delivery location through the contact page, or use the Add To Cart enquiry button on this page.
Last updated: October 2026
