This is a standard load cell for measuring weight up to 100 Kg. The output of the load cell is in milivolts and cannot be directly measured by a microcontroller. So an ADC with high resolution or an instrumentation amplifier is required to make the output of the load cell readable to a microcontroller.
A load cell is a transducer that is used to create an electrical signal whose magnitude is directly proportional to the force being measured. The various types of load cells include hydraulic load cells, pneumatic load cells and strain gauge load cells.
This is a standard load cell for measuring weight up to 100 Kg. The most common use of this weight sensor is in weighing machine. All scales that display weight have a load cell as a measurement factor.
This conversion is indirect and takes place in two steps. Due to the mechanical placement, the recorded force deforms the strain gauge. Strain gauges measure deformation (elongation) as an electrical signal because elongation changes the effective electrical resistance of the wire. Load cells typically consist of four strain gauges in a Wheatstone bridge configuration. Load cells with one strain gauge (quarter bridge) or two strain gauges (half bridge) are also available.
The electrical signal output is typically on the order of a few millivolts and requires amplification by an instrumentation amplifier before use. The output of the transducer is connected to an algorithm for calculating the force applied to the transducer. load cells are used in various types of measuring instruments such as scales and universal testers.
Specification of 100kg load cell :
- Capacity : 100 KG
- Rated output(MV/V) : 1.944 mv/v
- Combined error(%RO) : <±0.030
- Creep(%RO/30min) : 0.018
- Temperature effect on sensitivity(%RO/°C) : 0.016
- Temperature effect on zero(%RO/°C) : 0.020
- Zero balance(%RO) : 1.5
- Input resistance(O) : 405±10
- Output resistance(O) : 350±5
- Insulation resistance(MO<50V>) : 5000
- Recommended excitation voltage(V) : 10~15
- Compensated temperature range(°C) : -10~+40
- Operating temperature range(°C) : -35~+80
- Safe overload(%RO) : 120
- Ultimate overload(%RO) : 150
- Load cell material : Aluminium
- Method of connecting wire : Red(+),Black(-),Green(+),White(-)
