AEM Electronics Stainless Steel Absolute Pressure (PSIa) Sensors provide highly accurate and rapid monitoring of pressure referenced against absolute zero pressure, available in a variety of working pressure ranges*. Ideal for applications requiring accurate feedback of positive and negative (vacuum) pressure applications.Stainless-steel sensors are accurate to within 1% of full scale (pressure sensors)High-quality sealed sensor housings are virtually impervious to automotive fluids (360-degree welded wetted area)Connector and pins includedAEM's Absolute pressure (PSIa) sensors accurately measure pressure referenced against absolute zero. Absolute zero is the pressure measurement when all the pressure exerted by the atmosphere has been removed. The most common use for absolute pressure sensors is reading manifold pressure. PSIa pressure sensors are essential for applications that measure vacuum. A PSIa sensor will read about 14.7 PSI when the sensing element is exposed to atmospheric p