Kavlico offers a robust differential sensor for use with after-treatment systems to monitor particulate matter in diesel engine exhaust. Sensors communicate data to determine when a system should regenerate or burn out toxic exhaust particles from the diesel particulate filter. Features include a ceramic capacitive sensing element, linear amplified output signal of 0.5 to 4.5 V dc, electromagnetic induction/radio-frequency interference, reverse polarity, and short circuit protection. The devices have a proof pressure of 2 bar (29 psi) and an operating temperature range of -40° to +125°C (-40 to +257°F). The composite housing is suitable to operate in exhaust media settings requiring corrosion durability and can withstand high vibration.