Gryphon Investors has announced it has sold Potter Global Technologies to investment funds managed by KKR.

Potter, based in St. Louis, Mo., is global provider of fire safety and emergency communication products. Started in 1898, Potter serves customers in healthcare and several other markets.

Gryphon, based in San Francisco, focuses on middle market companies in healthcare and other industries. Founded in 1997, the firm pursues control equity investments and prefers to make more substantial investments from a dollars perspective. Within healthcare, Gryphon targets the provider services, hospital/major facilities and non-reimbursement industries.

KKR is a global investment firm.

Terms of the transaction were not disclosed.