oh yeah I was gonna point out the 2.95V thing but you beat me to it.
I recommend putting a 1uf or 100nf capacitor in series with the 10k resistors. The problem I see with the circuit without proper capacitors in place is that you require the Nermest cell to be perfectly .45V above your virtual ground. If the nermest cell is slightly below or above the .45V then your differential amp will output a difference. If you filter out the AC signal itself without the 0.45 required DC offset and use the diff amp on the ac signal itself then the circuit should be cool.
I made a mistake when I said that the TE unit powers off the sensor, It is jsut that I use coupling capacitors and when I did not see any I jumped to that conclusion.
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