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Difference between revisions of "Load Cells"
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* Strain Gauge Load cell | * Strain Gauge Load cell | ||
Hydraulic Load Cell: the piston is placed in a thin elastic diaphragm. The piston | |||
Hydraulic Load Cell: the piston is placed in a thin elastic diaphragm. The piston doesn't actually come in contact with the load cell. Mechanical stops are placed to prevent over strain of the diaphragm when the loads exceed certain limit. The load cell is completely filled with oil. When the load is applied on the piston, the movement of the pistonand the diaphragm arrangement result in an increase of oil pressure which in turn produces a change in the pressure on a bourdon tube connected with the load cells | |||
Pneumatic load cells : the load cell is designed to automatically regulate the balancing pressure. Air pressure is applied to one end of the diaphragm and it escapes through the nozzle placed at the bottom of the load cell. A pressure gauge is attached with the load cell to measure the pressure incide the cell. The deflection of the diaphragm affects the airflow through the nozzle as well as the pressure inside the chamber. | Pneumatic load cells : the load cell is designed to automatically regulate the balancing pressure. Air pressure is applied to one end of the diaphragm and it escapes through the nozzle placed at the bottom of the load cell. A pressure gauge is attached with the load cell to measure the pressure incide the cell. The deflection of the diaphragm affects the airflow through the nozzle as well as the pressure inside the chamber. | ||