equity firm Blackstone Inc. in a $14billion deal including debt. Products Emerson Electric produce's avionics here is a list of some of their products AN/APG-69 AN/APQ-157 AN/APQ-159 Corporate The company's leaders since the mid-20th century have been, respectively, W. R. Persons (19541973; President), Charles Knight (19732000, CEO), and David Farr (20002021, CEO). The company's chair of the board have been Charles Knight (19742004) and David Farr (2004 to 2021). Jim Turley is the current Chair of the Board. Emerson is structured into two business units: automation; and commercial and residential. Environmental records In 2008 (using data from 2005), researchers at the University of Massachusetts Amherst identified Emerson as the 97th largest corporate producer of air pollution in the United States, down from its previous rank of 56th. Major pollutants indicated by the study include nickel compounds, manganese, diisocyanate, and lead. Corporate relationships Emerson's brands acquisitions On December 22, 2014, Emerson announced the acquisition of Scotland-based Cascade Technologies Ltd., expanding their gas-analysis portfolio with laser-based measurement analyzers and systems for enhanced industrial emissions monitoring, production efficiencies and regulatory compliance. Other main Emerson acquisitions and brands include: Advanced Protection Technologies AMS Suite American Governor Company Aperture APM Automation Solutions Alco Controls Appleton Group (formerly EGS Electrical Group) Artesyn (spun off on Jan 2014) ASCO International (sold to Schneider Electric in 2017) ASCO Numatics Astec (spun off on Jan 2014) Aventics Avocent Avtron Loadbank Bettis Branson Bristol Babcock Cascade Technologies Ltd Chloride Group Chromalox (sold to JPMorgan Partners in 2003) Closet Maid (sold to Griffon Corp in late 2017) Control Products Control Techniques (sold to Nidec in early 2017) Cooper-Atkins Copeland CSI Technologies DeltaV Dixell Electronic Navigation Industries Enardo LLC Energy Systems Firetrol Fisher Regulators Fisher Valves & Instruments Fusite GeoFields Greenlee Tools Groveley Detection Ltd InSinkErator Intelligent Store Islatrol Knurr (a business of Vertiv now) Leroy-Somer (sold to Nidec in early 2017) Liebert (a business of Vertiv now) METCO Metro (InterMetro Industries) Micro Motion Mimic Mobrey Open Systems International (pending sale late 2020) Ovation Paine Electronics Paradigm Pentair Valves & Controls Permasense Plantweb Optics Power Transmission Solutions Progea Group ProSys, Inc. ProTeam Pryne & Co., Inc. Ridgid (Ridge Tool Company) Rosemount Rosemount Analytical Roxar Saab Marine Electronics Sensi Spence and Nicholson SSB Wind Systems (sold to Nidec in early 2017) Surge Protection Syncade TopWorx Tescom Therm-O-Disc Verdant Vilter White-Rodgers WORKSHOP Zedi NBC Heroes lawsuit On October 2, 2006, Emerson filed suit in