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Lab Testing - Particle Lab

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Sweco Optical Comparitor for Screens Separators Sifters Screeners
Laser Particle Size Analyzer: A particle analyzer which uses a laser beam to make precise measurements of the particles in an aqueous solution. Primarily used to analyze materials which are processed in a grinding mill or where very fine particle size identification is required. The analyzer measures particles which range in size from 0.04 microns to 2,000 microns. A detailed analysis sheet is provided with all tests in which this tool is used.

Optical Screen Comparator: Imaging system which uses a high powered zoom lens to take a microscopic look at a screen mesh. The comparator serves dual functions; primarily it is used to certify that a given screen corresponds to its stated screen mesh (used on very fine screen meshes which are difficult to certify with the naked eye). Certification documents can be provided for a screen upon request. The secondary function is to take a detailed look at a screen after it has been in operation to dertimine wear, degree of blinding and any other parameters which are difficult to ascertain with the unaided eye.

Moisture Analysis: Sweco's technicians and equipment combine to ensure accurate, reliable moisture tendencies of your material. Additionally, our moisture analyzing equipment provides exceptionally fast and repeatable heating of the sample.

Sieve Analysis: Primarily used to determine particle size ranges for dry materials. A test sieve consists of a cylindrical sleeve with a screen mesh attached to its bottom lip. Sweco adheres to the U.S. Standard Sieve specifications, which range in mesh sizes from 3.5 mesh (5,660 microns) to 400 mesh (38 microns). All dry tests have a sieve analysis performed on the feed and processed materials to determine separation efficiency. This is done by selecting sieves in the ranges corresponding to the test unit screen meshes, weighing the materials which do not pass through each sieve, and then determining percentages.