Im trying to simulate a full bridge sensor- Load cell 

[![enter image description here][1]][1]

Above is the reff circuit im using, I know creating bridge circuit like this one below would work, but im not able to get the potentiomenter to get the bridge slightly unbalance(0.1%) so that i can measure a 25mV/volt generated in signal + and signal-

I created the above circuit- but unfortunate, i dint have 3.3M in 1/2 Watt, i think for this reason changing R5 for the full span is giving just 5mv/volt output- Im giving excitation voltage as 5volt

can any one help me generate 25mv/volt output from the circuit?

[![enter image description here][2]][2]


  [1]: https://i.sstatic.net/I6oge.png
  [2]: https://i.sstatic.net/fvrEI.jpg