IM’s October issue will include a review of the latest ideas and technologies in conveying. For sampling from conveyors, the True-Belt® Sampler offers sampling theory compliance and ensures a truly representative sample, according to Multotec. Developed by Multotec in collaboration with Dr D Francois-Bongarcon, the sampler’s design is based on existing go-belt technology. This innovative sampler incorporates several design features which guarantee the structural absence and impossibility of sample bias.
Rolf Steinhaus, Director – Multotec Process Equipment, says the upgraded design used for the True-Belt Sampler is based on an in-depth analysis of any bias triggered mechanisms. “In this further improved cross belt design, the material is sampled only after it has been removed from the belt in a manner that gives every fragment originally on the belt the same probability of ultimate selection into the sample. This equi-probability is known as the condition that guarantees no-bias according to Pierre Gy’s sampling and heterogeneity theories,” he explains.
The sampler design complies with international sampling standards and is suitable for conveyor belt widths from 450 to 2,400 mm. It can be installed on horizontal or inclined conveyor belts with an angle of up to 18° and is will suit various troughing idlers. It is a direct drive unit with a geared brake motor and a dedicated brake controller panel and adjustable timer. Where applications dictate, a long and durable stainless steel or manganese steel sampler plough will be used.
Sampling using the True-Belt Sampler can be either mass- or time-based, and the system is supplied complete with exaggerated housing and a rubber or polyurethane skirting and curtains to prevent spillages of agitated materials. It can be adapted to allow sampling of most conveyed materials.
Steinhaus warns that one needs to be mindful of the rejects handling required after this primary sampling step. “The True-Belt Sampler is engineered to suit individual application requirements, and can be easily mounted along individual sections of conveyor. When installed correctly for retrofit projects minimal modification is required to the plant.”