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Emisense Technologies
Emisense Technologies is a Ladera Ranch, California sensor company that builds PMTrac, an electrostatic particulate matter (ePM) sensor for measuring soot and ultrafine particles directly in the exhaust stream. Founded in 2009 by serial automotive-electronics entrepreneur Patrick Thompson, the company sells a low-cost, durable, in-situ alternative to lab-grade emissions instruments - aimed at automotive on-board diagnostics, generators, and industrial combustion. In 2025 it signed a global Tier-1 automotive supplier to industrialize the sensor, with serial production targeted for 2028.
Patrick Thompson
Patrick Thompson is the founder and CEO of EmiSense Technologies, a Ladera Ranch, California company building the PMTrac electrostatic particulate matter (ePM) sensor that measures tailpipe soot in real time. A three-time founder, he previously built Innovate Motorsports - maker of the cult LM-1 air/fuel ratio meter, later acquired by AutoMeter - and co-founded InterWorks Computer Products, acquired by Sanmina. In 2025 EmiSense signed a global Tier-1 automotive supplier to commercialize its sensor, with serial production targeted for 2028.