Sensex ended the session at 82,102.10, down 57.87 points or 0.07 per cent. The 30-share index started the session flat at 82,147.37 against last session's closing of 82,159.97. The index remained range-bound amid selling in IT and FMCG stocks. Nifty closed at 25,169.50, down 32.85 points or 0.13 per cent.