{"id":10657,"date":"2026-09-30T10:38:04","date_gmt":"2026-09-30T10:38:04","guid":{"rendered":"https:\/\/shop.autoboss.com\/?post_type=product&#038;p=10657"},"modified":"2026-10-09T05:50:59","modified_gmt":"2026-10-09T05:50:59","slug":"autool-pt503-mini-differential-pressure-gauge","status":"publish","type":"product","link":"https:\/\/autoboss.com\/de\/product\/autool-pt503-mini-differential-pressure-gauge\/","title":{"rendered":"AUTOOL PT503 -101 to 200 kPa Mini Differential Pressure Gauge"},"content":{"rendered":"<div class=\"abd-pd\" data-abd-version=\"1\">\n<header class=\"abd-hero\">\n<h3>Pocket-Size Positive, Vacuum and Differential Pressure Readings<\/h3>\n<p class=\"abd-lead\">The PT503 measures positive, negative and differential pressure on compatible automotive and workshop ports, switches between six units and holds a reading for recording. Seven adapter sizes connect it to varied test points.<\/p>\n<ul class=\"abd-facts\">\n<li>-101 to 200 kPa<\/li>\n<li>\u00b10.5% FS<\/li>\n<li>6 Pressure Units<\/li>\n<li>7 Adapter Sizes<\/li>\n<li>Data Hold<\/li>\n<\/ul>\n<\/header>\n<section class=\"abd-sec\" id=\"abd-features\">\n<h4>Key Features<\/h4>\n<ol class=\"abd-features\">\n<li>\n<h5>Three Pressure Types<\/h5>\n<p>Positive, negative and differential pressure for intake manifold, brake booster, exhaust, crankcase and crankshaft-related checks within range.<\/p>\n<\/li>\n<li>\n<h5>One-Button Data Hold<\/h5>\n<p>Lock the current reading so it stays visible for recording, comparison or reporting.<\/p>\n<\/li>\n<li>\n<h5>Switchable Units<\/h5>\n<p>Change units on the gauge to match the service reference without manual conversion.<\/p>\n<\/li>\n<li>\n<h5>Status at a Glance<\/h5>\n<p>The screen shows the pressure type with the selected unit, battery level and hold status.<\/p>\n<\/li>\n<li>\n<h5>Startup Auto-Zero<\/h5>\n<p>The gauge zeroes and calibrates to atmospheric pressure each time it powers on.<\/p>\n<\/li>\n<li>\n<h5>Compact, Reinforced Body<\/h5>\n<p>Small enough for field checks, with a reinforced housing and a backlight for dim work areas.<\/p>\n<\/li>\n<\/ol>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-compare\">\n<h4>Model Comparison<\/h4>\n<div class=\"abd-table-wrap\">\n<table class=\"abd-table abd-compare\">\n<thead>\n<tr>\n<th scope=\"col\"><\/th>\n<th scope=\"col\" class=\"is-current\">PT503<\/th>\n<th scope=\"col\">PT520<\/th>\n<th scope=\"col\">PT530<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Display<\/th>\n<td class=\"is-current\">1.8-inch<\/td>\n<td>2.8-inch<\/td>\n<td>2.8-inch<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Pressure range<\/th>\n<td class=\"is-current\">-101 to 200 kPa<\/td>\n<td>-100 to 200 kPa<\/td>\n<td>-100 to 300 kPa<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Accuracy<\/th>\n<td class=\"is-current\">\u00b10.5% FS<\/td>\n<td>\u00b10.3% FS<\/td>\n<td>\u00b10.25% FS<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Data storage<\/th>\n<td class=\"is-current\">Data hold only<\/td>\n<td>29 sets<\/td>\n<td>29 sets<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Flashlight<\/th>\n<td class=\"is-current\">No<\/td>\n<td>Yes<\/td>\n<td>Yes<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Magnetic back \/ toolbox<\/th>\n<td class=\"is-current\">No \/ No<\/td>\n<td>No \/ No<\/td>\n<td>Yes \/ Yes<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<\/div>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-box\">\n<h4>What&#8217;s in the Box<\/h4>\n<ul class=\"abd-box\">\n<li>PT503 differential pressure gauge<\/li>\n<li>Measurement adapters<\/li>\n<li>Measurement hose and tubing<\/li>\n<li>User manual<\/li>\n<li>Retail box<\/li>\n<\/ul>\n<figure class=\"abd-fig\"><img decoding=\"async\" src=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/b6955601837ded583d8b633f.webp\" alt=\"AUTOOL PT503 gauge with user manual, retail box, measurement adapters, hose and tubing\" width=\"1200\" height=\"1200\" loading=\"lazy\"><figcaption>PT503 package contents.<\/figcaption><\/figure>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-use\">\n<h4>How to Use<\/h4>\n<ol class=\"abd-steps\">\n<li><b>Power on unpressurized<\/b><span>Install the AAA batteries and switch on with no pressure applied so auto-zero stays accurate.<\/span><\/li>\n<li><b>Connect hose and adapter<\/b><span>Choose the adapter for the test port and check the hose and connectors first.<\/span><\/li>\n<li><b>Select unit and backlight<\/b><span>Switch to the unit you need and turn on the backlight in dim areas.<\/span><\/li>\n<li><b>Hold and record<\/b><span>Lock the reading with data hold before recording or comparing.<\/span><\/li>\n<\/ol>\n<p class=\"abd-note\">Pressure types, adapters, data hold and troubleshooting: <a href=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/b0629d1913ad571b310c7282.pdf\" target=\"_blank\" rel=\"noopener\">PT503 user manual (PDF)<\/a>.<\/p>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-notes\">\n<h4>Good to Know<\/h4>\n<div class=\"abd-notes\">\n<div class=\"abd-note-group is-caution\">\n<h5><span class=\"abd-tag\">Caution<\/span><\/h5>\n<ul>\n<li>Do not use beyond the maximum range of 200 kPa.<\/li>\n<li>Powering on under pressure can cause inaccurate readings.<\/li>\n<li>Use only suitable non-corrosive media.<\/li>\n<\/ul>\n<\/div>\n<div class=\"abd-note-group is-care\">\n<h5><span class=\"abd-tag\">Care<\/span><\/h5>\n<ul>\n<li>Do not squeeze, sharply bend or block the silicone tube while measuring.<\/li>\n<li>Keep the gauge away from strong vibration, strong magnetic fields and rapid temperature changes.<\/li>\n<li>Replace the batteries if the battery indicator flashes or readings become unstable.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Positive, Negative + Differential Pressure:<\/strong> Measure positive, negative, or differential pressure for compatible automotive and workshop paths.<\/li>\n<li><strong>-101\u2013200 kPa Range:<\/strong> Capture pressure changes across -101 to 200 kPa with accuracy up to \u00b10.5% FS.<\/li>\n<li><strong>Six Pressure Units:<\/strong> Switch among psi, inHg, kPa, mbar, bar, and mmHg without manual conversion.<\/li>\n<li><strong>One-Button Data Hold:<\/strong> Lock the current reading for recording or comparison after measurement.<\/li>\n<li><strong>Seven Adapter Sizes:<\/strong> Connect to different pressure ports with seven included adapter sizes.<\/li>\n<\/ul>","protected":false},"featured_media":12638,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[128],"product_cat":[74],"product_tag":[],"class_list":["post-10657","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-engine-pressure-tester","first","instock","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product\/10657","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/comments?post=10657"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media\/12638"}],"wp:attachment":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media?parent=10657"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_brand?post=10657"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_cat?post=10657"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_tag?post=10657"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}