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Strain gauge mass

  1. Oct 11, 2008 #1
    imdoin an experiment with a strain gauge sensor to measure mass. the 2 strain gauges are in a wheatstone bridge and the wheatstone bridge is connected to 3 741 op amps to amplify the signal. i need an output of cetain voltages for certain masses input.

    My circuit is giving an output to high or too low for my requirement and when I get it right for 1 mass, it goes wrong for the next. Can anyone help? Need it urgently

    Im using a pot to vary the resistance in the instrumentation amp circuit.
  2. jcsd
  3. Oct 12, 2008 #2


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    Science Advisor
    Gold Member

    Welcome to PF.
    It would be nice if you could provide a schematic of your circuit.
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