Siemens has solutions for measuring silica sand in storage bins and the amount transported

Measuring silica sand can be a challenge—particularly when using 24-GHz frequency. The spherical shape and steep angle of repose of frac sand deflects the emitted signal yielding a false reading. The advanced process signaling of a two-wire, 78-GHz frequency modulated continuous wave radar (FMCW) solves the majority of reflective issues caused by silica. The high frequency enables emission of a very short 4-millimeter wavelength to provide exceptional signal reflection, even from solids with a steep angle of repose. One such device also includes a new lens-styled antenna with a 4-degree beam angle and sensing range of 328 feet.

Some belt scales are designed for drop-in installation, allowing for easier installation. Two people can set the scale into place, eliminating the need for heavy lifting equipment, which reduces cost, and less dynamic steel allows faster response to changing loads. These scales measure within ¼ percent with two weigh idlers.

Other belts scales may require as many as six idlers. This can reduce the length of the weigh area by as much as 20 feet. The drop-in scale can be installed in conveyors where other belt scales can not be separated far enough from the belt direction changes, allowing for more available locations for the scale.

These scales use two parallelogram load cells per idler, one on each side. In this configuration with technique of balancing these load cells, the accuracy is unaffected regardless of where the material is loaded—even if the belt is loaded heavier on one side. Making the weighbridges able to take abuse, be reliable and have lower maintenance cost provides a lower cost of ownership. They are also rigid, very accurate and have low maintenance.