{"id":9242,"date":"2020-05-02T03:27:09","date_gmt":"2020-05-02T03:27:09","guid":{"rendered":"https:\/\/www.obd2tool.com\/blog\/?p=9242"},"modified":"2020-05-01T08:03:05","modified_gmt":"2020-05-01T08:03:05","slug":"whats-the-difference-between-an-absolute-pressure-and-gauge-pressure-using-sensor-on-cat-caterpillar-et","status":"publish","type":"post","link":"https:\/\/www.obd2tool.com\/blog\/whats-the-difference-between-an-absolute-pressure-and-gauge-pressure-using-sensor-on-cat-caterpillar-et\/","title":{"rendered":"What&#8217;s the difference between an &#8220;Absolute&#8221; Pressure and &#8220;Gauge&#8221; Pressure (using Sensor) on CAT Caterpillar ET?"},"content":{"rendered":"<p><img loading=\"lazy\" class=\"alignnone wp-image-9240 size-full\" src=\"https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-1.jpg\" alt=\"\" width=\"400\" height=\"301\" srcset=\"https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-1.jpg 400w, https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-1-300x226.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>Absolute Pressure is measured relative to a full vacuum (in the empty, air-free space), and uses absolute zero as its reference pressure. Pressure that is measured against Atmospheric Pressure (also known as Barometric Pressure) is called Gauge Pressure.<\/p>\n<p>Average Barometric Pressure (1 ATM) at sea level is ~14.7 Psi (100 Kpa) or 1 Bar.<\/p>\n<p><img loading=\"lazy\" class=\"alignnone wp-image-9241 size-full\" src=\"https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-2.jpg\" alt=\"\" width=\"400\" height=\"301\" srcset=\"https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-2.jpg 400w, https:\/\/www.obd2tool.com\/blog\/wp-content\/uploads\/2020\/04\/Caterpillar-ET-2-300x226.jpg 300w\" sizes=\"(max-width: 400px) 100vw, 400px\" \/><\/p>\n<p>According to two picture,we can find the Formula for the Absolute Pressure:<\/p>\n<p>Absolute Pressure = Atmospheric Pressure + Gauge Pressure<\/p>\n<p><strong><b>Related Information:<\/b><\/strong><\/p>\n<p>Atmospheric (Barometric) Pressure Sensor<\/p>\n<p>The correct reading for the Atmospheric Pressure Sensor is between 50 kPa (7.3 psi) and 100 kPa (15 psi).<\/p>\n<p><strong><b>Altitude Derate<\/b><\/strong><\/p>\n<p>The engine may be derated due to high elevation. Use <a href=\"https:\/\/www.obd2tool.com\/goods-333-Best+quality+CAT+Caterpillar+ET+Diagnostic+Tool.html\">Cat ET<\/a> to check for an active Engine Derate on the Status Flags screen.<\/p>\n<p>Note: There are no event codes that are associated with the Altitude Derate.<\/p>\n<!-- AddThis Advanced Settings generic via filter on the_content --><!-- AddThis Share Buttons generic via filter on the_content -->","protected":false},"excerpt":{"rendered":"<p>Absolute Pressure is measured relative to a full vacuum (in the empty, air-free space), and uses absolute zero as its<!-- AddThis Advanced Settings generic via filter on get_the_excerpt --><!-- AddThis Share Buttons generic via filter on get_the_excerpt --><\/p>\n","protected":false},"author":3,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":[],"categories":[65],"tags":[1404,940,1334,1394],"views":2230,"_links":{"self":[{"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/posts\/9242"}],"collection":[{"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/users\/3"}],"replies":[{"embeddable":true,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/comments?post=9242"}],"version-history":[{"count":1,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/posts\/9242\/revisions"}],"predecessor-version":[{"id":9243,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/posts\/9242\/revisions\/9243"}],"wp:attachment":[{"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/media?parent=9242"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/categories?post=9242"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.obd2tool.com\/blog\/wp-json\/wp\/v2\/tags?post=9242"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}