I am looking for a digital weight indicator where we can also add the pressure signal of the hopper along with the load cell signal. The hopper will be calibrated at 0 pressure and as the pressure of the hopper is increased, the pressure signal will be added to the load cell signal and the resultant correct weight will be displayed or sent to PLC as 4-20 mA signal. Can somebody help me in this regard?

 

Modicon has just such a device. The specs, manuals and other application information are at
http://www.modicon.com
The module form factor is a din rail mounted module the size of a TIO module and they can talk Modbus Plus and pass input, output and register information. We have tested this unit with great success. One module can handle 8 channels and all setup parameters are easily changed with software.