Exhaust back-pressure (EBP) sensors from Kavlico improve engine performance and efficiency by protecting the engine from over-pressure damage in systems with or without a diesel particulate filter (DPF). EBP emissions sensors provide diagnostic information to the engine control unit for regeneration of the DPF. The sensors can withstand operating temperatures of -15 to +125°C (5 to 257°F). Features include Kavlico's calibration and compensation methods, ceramic capacitive sense elements, stainless steel housings, and custom configurations. The sensors operate on a 5-V dc power supply with pressure ranges of 0 to 5.8 and 0 to 7.975 psi (0 to 0.4 and 0 to 0.55 bar). Low power consumption and hysteresis, humidity tolerance, and short circuit and reverse polarity protection make the sensors suitable for exhaust environments with severe vibration and caustic soot and acids.