In parallel/counter current dryers design, the spray and the air are introduced at opposite ends of the dryer, with the atomizer positioned at the top and the air entering at the bottom. The counter current dryers offer more rapid evaporation and higher energy efficiency, because the driest particles are in contact with hottest air. It normally uses nozzles for atomization because the energy of the spray can be directed against the air movement. Soaps and detergents are commonly dried in counter-current dryers.
Parallelogram load cell includes a pair of parallel, spaced-apart load-receiving members, which are interconnected by parallel beams. Moments applied to the force-receiving members are translated into forces applied to the beams along their longitudinal axes. Strain-sensing devices mounted on the upper and lower surfaces of the beams are connected differentially so that the strain gauges respond to bending but not elongation and compression. The beams of conventional parallelogram load cells have ends with intersect their respective supports at ninety degrees, thus forcing the beam to bend in a compound S-shaped curved.