The Audax Group has acquired Phillips & Temro from Morgenthaler Private Equity for an undisclosed amount. P&T is an Eden Prairie, Minn.–based maker of diesel-related air-intake heaters, engine block heaters, cooling fans and industrial silencers. Morgenthaler first invested in 2004. www.morgenthaler.com
Linden Capital Partners has agreed to acquire SeraCare Life Sciences Inc. (Nasdaq: SRLS), a provider of products and services to facilitate the discovery, development and production of human diagnostics and therapeutics. The deal is valued at approximately $82 million, or $4 per share. www.seracare.com
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