The qilin ransomware group listed Primary Flow Signal: Flow Meters | Flow Measurement on its data leak site on 2025-03-25. Country: US Sector: Manufacturing Domains named: primaryflowsignal.com Claim as published on the leak site: Primary Flow Signal has been producing flow meters for over 30 years, since its founding by Hungarian immigrant, Dezsoe (Dezi) Halmi, and has emerged as the preeminent industry player in North America, with a reputation for reliability, accur ...