Manufacturing sales increased 5.7% on the month in September, but mining sales were down 1.5%, the data showed.
By sector, sales of capital and rose 34.7% on the month, while durable goods sales were up 5%.
However, energy sales fell 7.2% in September compared with the previous month, while sales of consumer and intermediate goods declined 3.9% and 0.6%, respectively, the data showed.
On an annual basis, industrial sales decreased 2.7% in September, largely due to a 2.9% decline in manufacturing sales. Mining sales increased 3.1% on the year.
In January through September, Romanian industrial sales rose 2.7% on the year, fueled by increases in all sectors.