Profile: Aparna Agencies, Bangalore is a manufacturer and exporter of survey & testing equipments. We are an ISO 9001:2008 certified company. Our survey instruments include soil, bitumen, aggregate and cement testing instruments. We offer GPS products include DGPS, binoculars & telescopes, and other allied products. We also provide compasses, tripods and tribatches. Our slump cones are extensively used in the tests that are carried out by filling the slump cone with freshly mixed concrete. This concrete is tamped with a steel rod in three layers and is levelled with the top of the slump cone. We offer these slump cones in standard sizes and specifications. Our sand pouring cylinder with tray are manufactured using plastic and other raw materials. Our range of apparatus is used for field density estimation of fine and medium grained soils. Elongation gauges are used to measure the aggregate length of individual particles. When the length of the aggregate particles is 1.8 times more than the normal size, these are considered to be elongated. The tests conducted by using length gauges are not applicable to material retained on 63.0 mm BS test sieve.