Ampersand Capital Partners has completed an investment in Sterling Medical Devices, according to a news release.

Sterling, based in Moonachie, N.J., is a provider of electromechanical and software solutions for the medical device industry. Founded in 1998, the company assists healthcare companies in bringing to market medical device software and hardware, mechanical equipment, and mobile medical device apps.

Ampersand, based in Wellesley, Mass., is a middle market private equity firm with a focus on growth equity investments in the healthcare sector. Founded in 1988, the firm typically pursues majority or minority positions in companies generating between $10 million and $100 million in revenue.

Terms of the investment were not disclosed.