The BSE benchmark index Sensex recovered by almost 52 points in early trade on Tuesday. The Sensex, which had lost 82.06 points in the previous session, recovered by 51.99 points, or 0.29 per cent to 17,800.68 points.Similarly, the broad-based Nifty of the National Stock Exchange moved up by 8.50 points, or 0.16 per cent to 5,390.10 points with oil and gas, healthcare, PSUs, consumer durables and metal stocks trading in the positive zone.