Question

difference between pneumatic load cell and hydraulic load cell
give me 5 points

Answer 1

Load cells are electronic devices that measure force. Hydraulic actuators and pneumatic actuators are cylinder and piston assemblies that produce motion from a pressure medium, hydraulic or pneumatic. The power steering unit on your car has a hydraulic actuator

Answer 2

Hydraulic Load Cells
Hydraulic load cells are also referred to as hydrostatic load cells. These are mainly used in industrial applications. These are force -balance devices, measuring weight as a change in pressure of the internal filling fluid. They give linear output reasonably unaffected by the amount of the filling fluid or by its temperature. Accuracy can be achieved within 0.25% full scale or better, provided the load cells have been correctly installed and calibrated. This range of accuracy is suitable for most process weighing applications. Since this sensor has no electric components, it is perfect for use in hazardous areas. Typical hydraulic load cell applications include tank, bin, and hopper weighing. These load cells can eliminate troubles encountered with strain gauge load cells. Hydraulic load cell is probably the best load cell to use in an outdoor environment because it is immune to transient voltage (lighting).
Pneumatic Load Cells
Pneumatic load cells also work on the force-balance operating principle. These devices make use of multiple dampener chambers to offer higher accuracy as compared to a hydraulic device. In several designs, the first dampener chamber is utilized as a tare weight chamber. Pneumatic load cells are frequently employed to measure moderately small weights in industries where cleanliness and safety are principal concerns.