Two pressure sensors from Kavlico assist in optimizing engine performance of heavy-duty engines. The air filter and oil filter restriction pressure sensors assist systems that monitor filter life and performance to ensure that an air filter or fuel filter does not become clogged, which compromises the engine’s air/fuel ratio. The sensors generally operate on 5 V dc and provide a 0.5 to 4.5 linear amplified analog output proportional to pressure. They tolerate high-vibration environments and have enhanced stability, repeatability, and hysteresis. Depending upon specification criteria, a ceramic capacitive or piezoresistive sense element can be selected for end-use compatibility. Process and electrical connector options are available to suit OEM installation requirements.