AEM 7 BAR Stainless Steel MAP Sensor Kit AEM 7 BAR MAP or 100 PSIA Stainless Steel Sensor Kit Sensors/Connectors Sensor Kit AEM offers high quality stainless steel PSIa sensors in 15 (1BAR), 30 (2BAR), 50 (3.5BAR), 75 (5BAR) and 100 (7BAR). PSIa is referenced to 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 required if you wish to measure vacuum. A PSIa sensor will read about 14.7 PSI when the sensing element is exposed to atmospheric pressure at sea level however they can be recalibrated to read zero at atmospheric and a negative number at values less than atmospheric pressure. There are many different tools that can be used for measurement, but the degree of accuracy is dependent upon the tool. For example, a ruler can measure distance with a good degree of accuracy, but for a more precise measurement a caliper should be used. The difference between a brass pressure sensor and a stainless steel pressure sensor is similar if we think about it in these terms: 100 PSIa or 7 Bar Stainless Sensor Kit. Stainless Steel Sensor Body. 1/8" NPT Male Thread. Includes: 75 PSIa or 5 Bar Stainless Sensor, Connector, Pins, 1/8" NPT to -4 Adapter & 1/8" NPT to 3/16" Barb Adapter Example: Brass Pressure Sensor used for a Boost Gauge - Reference/Information for knowing manifold pressure, not for ECU calibration. Use a Brass Pressure Sensor where you need a good reference to what pressure is being seen. Example: MAP Sensor information for the ECU - Calibration/crucial information for the ECU. -Stainless steel body, with high quality sealing which makes it impervious to fluids. Use a SS Pressure Sensor where you need exact details of the pressure. -Weather resistant connector and pins included Which Pressure Sensor is right for you? -Includes 1/8" NPT to -4 AN adapter. Stainless Pressure Sensor = Caliper -Accurate with 1% margin of error. Manifold Absolute Pressure Sensor Absolute (PSIa) Pressure Sensors Brass Pressure Sensor = Ruler AEM - Sensors/Connectors 1/8 in. NPT Male Thread MAP SENSOR KIT 7 BAR AEMEMANIABSO