As analysts and investors brace for earnings reports from more than a dozen major U.S. manufacturers over the next two weeks, they will eye revenue growth as one of the surest signs of health for the industrial sector over the next year.

Sales growth will be critical to profits this year, since major companies including General Electric Co, United Technologies Corp and 3M Co will likely face rising costs of everything from copper to payroll, which they had slashed going into the recession.

Cost management will matter if the sector is to continue its strong run on Wall Street. Standard & Poor's industrials group rose about 20 percent over the past year, the second-biggest gain in the broad S&P 500 index after the S&P consumer discretionary group which rose almost 26 percent.

"From a top-line, revenue side, we're going to see some modest expansion there," said Peter Klein, senior portfolio manager at Fifth Third Asset Management, in Cleveland, Ohio. "This is what I'm sort of tuning my ear to hear. And if we don't hear it, then maybe some of this ebullience that we've seen in the industrials since this summer will flatten out."