{"id":58535,"date":"2025-07-24T06:01:49","date_gmt":"2025-07-24T06:01:49","guid":{"rendered":"https:\/\/autoolstore.com\/?post_type=product&#038;p=58535"},"modified":"2026-09-14T23:32:05","modified_gmt":"2026-09-15T07:32:05","slug":"autool-pt503-mini-differential-pressure-gauge","status":"publish","type":"product","link":"https:\/\/autoolstore.com\/product\/autool-pt503-mini-differential-pressure-gauge\/","title":{"rendered":"AUTOOL PT503 Mini Differential Pressure Gauge"},"content":{"rendered":"\n\n\r\n<div class=\"autool-page-shell\"><main class=\"autool-description autool-product-page\" data-autool-lightbox=\"off\" data-autool-mobile-nav=\"false\" data-autool-rail-controls=\"true\" id=\"pt503-product-page\"><section class=\"autool-section autool-product-hero autool-section--overview\" data-autool-nav=\"Overview\" data-autool-surface=\"dark\" id=\"autool-overview\"><div class=\"autool-layout-container autool-product-hero__grid\">\r\n<div class=\"autool-product-hero__copy\">\r\n<p class=\"autool-product-hero__eyebrow\">AUTOOL PT503 \u00b7 Differential Pressure Gauge<\/p>\r\n<h2 class=\"autool-product-hero__title\">Measure Positive, Vacuum and Differential Pressure<\/h2>\r\n<p class=\"autool-product-hero__lead\">Measure positive, negative, or differential pressure on compatible automotive and workshop paths. PT503 covers -101 to 200 kPa with up to \u00b10.5% FS accuracy, switches among six common pressure units, and holds a reading for recording or comparison. Seven adapter sizes help connect the handheld gauge to varied pressure ports.<\/p>\r\n<ul aria-label=\"PT503 key benefits\" class=\"autool-product-hero__capabilities\">\r\n<li>-101 To 200 kPa Range<\/li>\r\n<li>Positive \/ Negative \/ Differential<\/li>\r\n<li>Accuracy Up To \u00b10.5% FS<\/li>\r\n<li>Six Pressure Units<\/li>\r\n<li>Seven Adapter Sizes<\/li>\r\n<\/ul>\r\n<nav aria-label=\"PT503 sections\" class=\"autool-product-hero__actions\"><a class=\"autool-product-button autool-product-button--primary\" href=\"#autool-features\">Explore Features<\/a><a class=\"autool-product-button\" href=\"#autool-use\">View Workflow<\/a><a class=\"autool-product-button\" href=\"#autool-comparison\">Specs &amp; Compare<\/a><\/nav>\r\n<\/div>\r\n<figure class=\"autool-product-hero__media\"><img alt=\"AUTOOL PT503 mini differential pressure gauge main product image for automotive pressure testing\" decoding=\"async\" fetchpriority=\"high\" loading=\"eager\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2025\/10\/874395e7-4090-4cd2-84a4-6d0c3f2a63e0.png\"\/><\/figure>\r\n<\/div><\/section><aside aria-label=\"PT503 at a glance\" class=\"autool-product-metrics\"><div class=\"autool-product-metrics__inner\">\n<div class=\"autool-product-metric\"><strong>-101\u2013200 kPa<\/strong><span>Pressure Range<\/span><\/div>\n<div class=\"autool-product-metric\"><strong>7<\/strong><span>Adapter Sizes<\/span><\/div>\n<div class=\"autool-product-metric\"><strong>\u00b10.5% FS<\/strong><span>Accuracy<\/span><\/div>\n<div class=\"autool-product-metric\"><strong>0.1 kPa<\/strong><span>Resolution<\/span><\/div>\n<\/div><\/aside><section class=\"autool-section autool-product-section--soft autool-section--value\" data-autool-surface=\"base\" id=\"autool-features\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Key Features<\/p>\r\n<h2 class=\"autool-title\">Three Pressure Modes in Six Units<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\" data-autool-rail=\"features\">\r\n<article class=\"autool-product-card\"><h3>High-Precision Sensor<\/h3>\r\n<p>Measures from -101kPa to 200kPa with accuracy up to \u00b10.5%FS, helping users capture subtle pressure changes during diagnostic and maintenance work.<\/p><\/article><article class=\"autool-product-card\"><h3>Three Pressure Types<\/h3>\r\n<p>Supports positive, negative, and differential pressure measurement. Use matching adapters for compatible automotive intake, brake-booster, exhaust, crankcase, and crankshaft-related pressure checks within the rated range.<\/p><\/article><article class=\"autool-product-card\"><h3>1.8-Inch Backlit LCD<\/h3>\r\n<p>The LCD backlit display helps users read pressure values clearly in bright, dim, workshop, or field testing environments.<\/p><\/article><article class=\"autool-product-card\"><h3>One-Button Data Hold<\/h3>\r\n<p>Lock the current reading for easier recording, comparison, or reporting when the pressure value needs to remain visible after measurement.<\/p><\/article><article class=\"autool-product-card\"><h3>6 Switchable Units<\/h3>\r\n<p>Switch between psi, inHg, kPa, mbar, bar, and mmHg without manual conversion, making the pressure result easier to match to different service references.<\/p><\/article><article class=\"autool-product-card\"><h3>Portable Body &amp; Adapters<\/h3>\r\n<p>The reinforced 125 \u00d7 56 \u00d7 30 mm body weighs about 120 g for portable workshop and field checks. Use the listed measurement adapters for the required pressure ports.<\/p><\/article><article class=\"autool-product-card\"><h3>Seven Adapter Sizes<\/h3>\r\n<p>Seven sizes of measurement adapters support connection to different pressure ports.<\/p><\/article><article class=\"autool-product-card\"><h3>Pressure Status Display<\/h3>\r\n<p>Read positive pressure, negative pressure and differential pressure alongside the selected unit, battery level and data hold status.<\/p><\/article><article class=\"autool-product-card\"><h3>5-Minute Auto Power-Off<\/h3><p>The gauge automatically powers off after about 5 minutes without operation or applied pressure.<\/p><\/article><article class=\"autool-product-card\"><h3>3 Years Warranty Support<\/h3><p>Main unit: 3-year warranty. Standard accessories: 1-year warranty. <a href=\"https:\/\/autoolstore.com\/warranty-policy\/\" rel=\"noopener\" target=\"_blank\">Warranty Policy<\/a>.<\/p><\/article><\/div>\r\n<\/div><\/section><section class=\"autool-section autool-section--workflow autool-section--workflow-anchor\" data-autool-surface=\"dark\" id=\"autool-use\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Service Workflow<\/p>\r\n<h2 class=\"autool-title\">Connect, Zero and Hold the Reading<\/h2><\/header><div class=\"autool-workflow\" data-autool-workflow=\"\" data-workflow-mode=\"panels\">\r\n<div aria-label=\"pt503 workflow\" class=\"autool-workflow__tabs\" data-workflow-tabs=\"\" role=\"tablist\">\r\n<button aria-controls=\"pt503-panel-0\" aria-selected=\"true\" class=\"autool-workflow__tab\" data-workflow-step=\"0\" id=\"pt503-tab-0\" role=\"tab\" tabindex=\"0\" type=\"button\">01<br\/><wbr\/>Install<wbr\/> Batteries<wbr\/> And<wbr\/> Power<wbr\/> On<\/button><button aria-controls=\"pt503-panel-1\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"1\" id=\"pt503-tab-1\" role=\"tab\" tabindex=\"-1\" type=\"button\">02<br\/><wbr\/>Connect<wbr\/> Hose<wbr\/> And<wbr\/> Adapter<\/button><button aria-controls=\"pt503-panel-2\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"2\" id=\"pt503-tab-2\" role=\"tab\" tabindex=\"-1\" type=\"button\">03<br\/><wbr\/>Select<wbr\/> Unit<wbr\/> And<wbr\/> Backlight<\/button><button aria-controls=\"pt503-panel-3\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"3\" id=\"pt503-tab-3\" role=\"tab\" tabindex=\"-1\" type=\"button\">04<br\/><wbr\/>Hold<wbr\/> And<wbr\/> Record<wbr\/> Data<\/button>\r\n<\/div>\r\n<div class=\"autool-workflow__position\">\r\n<span class=\"autool-workflow__position-label\">Step progress<\/span><span class=\"autool-workflow__progress\"><span class=\"autool-workflow__progress-bar\" data-workflow-progress=\"\"><\/span><\/span><span class=\"autool-workflow__position-count\" data-workflow-count=\"\">1 \/ 4<\/span>\r\n<\/div>\r\n<div class=\"autool-workflow__content\">\r\n<div class=\"autool-workflow__main\">\r\n<div class=\"autool-workflow__panels\">\r\n<article aria-labelledby=\"pt503-tab-0\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" id=\"pt503-panel-0\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">01<\/div>\r\n<h3 class=\"autool-workflow__title\">Install Batteries And Power On<\/h3>\r\n<p class=\"autool-workflow__description\">Install 2 \u00d7 1.5V AAA batteries. Power on the gauge without pressure applied so the startup auto-zero and atmospheric pressure calibration remain accurate.<\/p><\/article><article aria-labelledby=\"pt503-tab-1\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"pt503-panel-1\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">02<\/div>\r\n<h3 class=\"autool-workflow__title\">Connect Hose And Adapter<\/h3>\r\n<p class=\"autool-workflow__description\">Choose the correct hose and adapter for the test port. Check the hose, adapter, and connector condition before starting measurement.<\/p><\/article><article aria-labelledby=\"pt503-tab-2\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"pt503-panel-2\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">03<\/div>\r\n<h3 class=\"autool-workflow__title\">Select Unit And Backlight<\/h3>\r\n<p class=\"autool-workflow__description\">Use the unit function to switch between psi, inHg, kPa, mbar, bar, and mmHg. Use the backlight function when the working area is dim.<\/p><\/article><article aria-labelledby=\"pt503-tab-3\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"pt503-panel-3\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">04<\/div>\r\n<h3 class=\"autool-workflow__title\">Hold And Record Data<\/h3>\r\n<p class=\"autool-workflow__description\">Use the data hold function to lock the reading before recording, comparing, or reporting the pressure value.<\/p><\/article>\r\n<\/div>\r\n<div class=\"autool-workflow__actions\">\r\n<button class=\"autool-workflow__button\" data-workflow-prev=\"\" disabled=\"\" type=\"button\">\u2190 Previous<\/button><button class=\"autool-workflow__button autool-workflow__button--next\" data-workflow-next=\"\" type=\"button\">Next step \u2192<\/button>\r\n<\/div>\r\n<\/div>\r\n<aside class=\"autool-workflow__safety\" data-workflow-safety=\"\"><h3 class=\"autool-workflow__safety-title\">Before You Start<\/h3>\r\n<ul class=\"autool-workflow__safety-list\">\r\n<li>PT503 measures up to 200kPa. Do not use it beyond the maximum measurement range.<\/li>\r\n<li>The gauge performs startup zeroing and atmospheric pressure calibration. Powering on under pressure may cause inaccurate readings.<\/li>\r\n<\/ul><\/aside>\r\n<\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--soft\" data-autool-surface=\"base\" id=\"autool-safety\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Safe Use<\/p>\r\n<h2 class=\"autool-title\">Keep Media and Pressure Within Range<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\" data-autool-rail=\"safety\">\r\n<article class=\"autool-product-card\"><h3>Do Not Exceed 200kPa<\/h3>\r\n<p>PT503 measures up to 200kPa. Do not use it beyond the maximum measurement range.<\/p><\/article><article class=\"autool-product-card\"><h3>Power On Without Pressure<\/h3>\r\n<p>The gauge performs startup zeroing and atmospheric pressure calibration. Powering on under pressure may cause inaccurate readings.<\/p><\/article><article class=\"autool-product-card\"><h3>Check Hose And Adapter<\/h3>\r\n<p>Before testing, check the hose, adapter, battery condition, and connector fit to avoid unstable or incorrect measurements.<\/p><\/article><article class=\"autool-product-card\"><h3>Avoid Tube Compression<\/h3>\r\n<p>Do not squeeze, sharply bend, or block the silicone tube during measurement, because this may affect the pressure reading.<\/p><\/article><article class=\"autool-product-card\"><h3>Use Suitable Media<\/h3>\r\n<p>Use PT503 only with suitable non-corrosive test media and the correct connector setup for the pressure port being measured.<\/p><\/article><article class=\"autool-product-card\"><h3>Use 2\u00d7AAA Batteries<\/h3>\r\n<p>PT503 is powered by 2 \u00d7 1.5V AAA batteries. Replace batteries if the battery indicator flashes or readings become unstable.<\/p><\/article><article class=\"autool-product-card\"><h3>Interpret the Result in Context<\/h3>\r\n<p>Confirm both pressure ports, the permitted medium and the expected positive, negative or differential range before connection. Interpret the difference against the exact system and operating condition.<\/p><\/article>\r\n<article class=\"autool-product-card\"><h3>Protect Measurement Stability<\/h3><p>Keep the gauge away from strong vibration, strong magnetic fields, and rapid temperature changes during measurement.<\/p><\/article><\/div>\r\n<\/div><\/section><section class=\"autool-section autool-comparison\" data-autool-nav=\"Spec&amp;Comparison\" data-autool-surface=\"dark\" id=\"autool-comparison\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Model Comparison<\/p>\r\n<h2 class=\"autool-title\">Choose the Right Pressure Test Kit<\/h2><\/header><div class=\"autool-model-compare\" data-autool-model-compare=\"\" data-current-model=\"pt503\">\r\n<button aria-controls=\"compare-source-22-compare-model-picker\" aria-expanded=\"false\" aria-label=\"Open model comparison selector\" class=\"autool-model-compare__mobile-trigger\" data-compare-picker-open=\"\" type=\"button\"><span class=\"autool-model-compare__mobile-trigger-copy\"><strong>Compare models<\/strong><span data-compare-mobile-summary=\"\">Selected: PT503<\/span><\/span><span class=\"autool-model-compare__mobile-trigger-count\" data-compare-mobile-count=\"\">1<\/span><\/button>\r\n<button aria-label=\"Close model selector\" class=\"autool-model-compare__scrim\" data-compare-picker-close=\"\" tabindex=\"-1\" type=\"button\"><\/button>\r\n<div aria-labelledby=\"compare-source-22-compare-picker-title\" class=\"autool-model-compare__selector\" id=\"compare-source-22-compare-model-picker\" role=\"group\">\r\n<div class=\"autool-model-compare__selector-head\">\r\n<div class=\"autool-model-compare__selector-copy\">\r\n<h3 class=\"autool-model-compare__legend\" id=\"compare-source-22-compare-picker-title\">Model Guide<\/h3>\r\n<p class=\"autool-model-compare__instruction\">Choose one or more models. PT503 is selected by default.<\/p>\r\n<\/div>\r\n<div class=\"autool-model-compare__selector-tools\">\r\n<div class=\"autool-model-compare__count\" data-compare-count=\"\">1 model selected<\/div>\r\n<button aria-label=\"Close model selector\" class=\"autool-model-compare__picker-close\" data-compare-picker-close=\"\" type=\"button\">\u00d7<\/button>\r\n<\/div>\r\n<\/div>\r\n<div aria-label=\"Models available for comparison\" class=\"autool-model-compare__grid\" role=\"list\">\r\n<label class=\"autool-model-option autool-is-selected\" data-model-card=\"pt503\" role=\"listitem\"><input checked=\"\" data-model-checkbox=\"\" type=\"checkbox\" value=\"pt503\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">PT503<\/strong><span class=\"autool-model-option__tier\">\u2212101\u2013200 kPa range \/ 1.8-inch display \/ \u00b10.5% FS<\/span><\/span><span class=\"autool-model-option__current\">Current model<\/span><\/label><label class=\"autool-model-option\" data-model-card=\"pt520\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"pt520\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">PT520<\/strong><span class=\"autool-model-option__tier\">\u2212100\u2013200 kPa \/ 29 records \/ Flashlight<\/span><\/span><\/label><label class=\"autool-model-option\" data-model-card=\"pt530\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"pt530\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">PT530<\/strong><span class=\"autool-model-option__tier\">\u2212100\u2013300 kPa \/ \u00b10.25% FS \/ Toolbox<\/span><\/span><\/label><label class=\"autool-model-option\" data-model-card=\"pt660\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"pt660\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">PT660<\/strong><span class=\"autool-model-option__tier\">Brake pressure \/ Dual channel \/ 0\u2013210 bar<\/span><\/span><\/label>\r\n<\/div>\r\n<div class=\"autool-model-compare__selection-bar\">\r\n<p aria-live=\"polite\" class=\"autool-model-compare__status\" data-compare-status=\"\" id=\"compare-source-22-compare-result-status\" role=\"status\">AUTOOL PT503 is selected. Choose another model for a side-by-side comparison.<\/p>\r\n<div class=\"autool-model-compare__selection-actions\">\r\n<button class=\"autool-model-compare__clear\" data-compare-clear=\"\" disabled=\"\" type=\"button\">Reset selection<\/button><button class=\"autool-model-compare__done\" data-compare-picker-close=\"\" type=\"button\">Done<\/button>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<div class=\"autool-model-compare__result\" data-compare-result=\"\">\r\n<div class=\"autool-model-compare__result-toolbar\">\r\n<h3 class=\"autool-model-compare__result-title\" data-compare-title=\"\" id=\"compare-source-22-compare-result-title\">PT503 comparison<\/h3>\r\n<label aria-disabled=\"true\" class=\"autool-model-compare__difference-toggle\" data-differences-label=\"\"><input data-differences-only=\"\" disabled=\"\" type=\"checkbox\"\/> Show differences only<\/label>\r\n<\/div>\r\n<div data-compare-table=\"\">\r\n<div class=\"autool-compare-matrix__empty\" hidden=\"\">No model is selected. Choose a model to compare.<\/div>\r\n<div aria-describedby=\"compare-source-22-compare-result-status\" aria-labelledby=\"compare-source-22-compare-result-title\" class=\"autool-compare-matrix-wrap\" role=\"region\" tabindex=\"0\">\r\n<table class=\"autool-compare-matrix\" data-autool-columns=\"1\">\r\n<caption class=\"autool-visually-hidden autool-table-caption--accessible\">Comparison of AUTOOL Differential Pressure Gauges<\/caption>\r\n<colgroup>\r\n<col class=\"autool-compare-matrix__criteria-col\"\/>\r\n<col class=\"autool-compare-matrix__model-col\" data-compare-model=\"pt503\"\/>\r\n<col class=\"autool-compare-matrix__model-col\" data-compare-model=\"pt520\" hidden=\"\"\/>\r\n<col class=\"autool-compare-matrix__model-col\" data-compare-model=\"pt530\" hidden=\"\"\/>\r\n<col class=\"autool-compare-matrix__model-col\" data-compare-model=\"pt660\" hidden=\"\"\/>\r\n<\/colgroup>\r\n<thead><tr>\r\n<th scope=\"col\">Product Model<\/th>\r\n<th data-compare-model=\"pt503\" scope=\"col\">PT503<\/th>\r\n<th data-compare-model=\"pt520\" hidden=\"\" scope=\"col\">PT520<\/th>\r\n<th data-compare-model=\"pt530\" hidden=\"\" scope=\"col\">PT530<\/th>\r\n<th data-compare-model=\"pt660\" hidden=\"\" scope=\"col\">PT660<\/th>\r\n<\/tr><\/thead>\r\n<tbody><tr class=\"autool-compare-matrix__category\" data-compare-category=\"layout-group-1\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Pressure Measurement &amp; Display<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Display Screen<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">1.8-inch<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">2.8-inch<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">2.8-inch<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">3-inch<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Pressure Range<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">-101~200Kpa<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">-100~200Kpa<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">-100~300Kpa<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0\u2013210 bar<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Measurement Accuracy<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">\u00b10.5%Fs<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00b10.3%FS<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00b10.25%FS<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">\u00b11%FS<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Resolution<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">0.1kPa<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">1hpa, 0.1Kpa<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">1hpa, 0.1Kpa<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">0.1bar<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Backlit Display Screen<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Dual-Channel Pressure Testing<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">Simultaneously Measure the Pressure at Two Different Locations<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Simultaneously Measure the Pressure at Two Different Locations<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Simultaneously Measure the Pressure at Two Different Locations<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Two brake positions\/calipers via L\/R channels<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Multi-Parameter Display<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">Positive Pressure Value<br\/>Negative Pressure Value<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Positive Pressure Value<br\/>Negative Pressure Value<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Positive Pressure Value<br\/>Negative Pressure Value<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Left\/right real-time pressure, minimum, maximum, and front\/rear pressure difference<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-1\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Pressure Units<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">psi<br\/>inHg<br\/>Kpa<br\/>mbar<br\/>bar<br\/>mmHg<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Kpa<br\/>hPa<br\/>Torr<br\/>mbar<br\/>inHg<br\/>mmHg<br\/>inH2O<br\/>mmH2O<br\/>psi<br\/>kg\/cm2<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Kpa<br\/>hPa<br\/>Torr<br\/>mbar<br\/>inHg<br\/>mmHg<br\/>inH2O<br\/>mmH2O<br\/>psi<br\/>kg\/cm2<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">psi \/ bar \/ kg\/cm\u00b2<\/div><\/td>\r\n<\/tr><tr class=\"autool-compare-matrix__category\" data-compare-category=\"layout-group-2\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Data Controls &amp; Equipment<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-2\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Data Storage<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">29 Sets<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">29 Sets<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Locks the current reading; check the current specification for multi-record storage.<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-2\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Button Light Design<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-2\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Magnetic Design on the Back<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-2\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Flashlight Function<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-2\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Data Lock\/Clear\/Record<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">Data Lock<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr class=\"autool-compare-matrix__category\" data-compare-category=\"layout-group-3\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Connections &amp; Applications<\/span><\/th>\r\n<td class=\"autool-compare-matrix__category-track\" colspan=\"1\" data-compare-category-track=\"\"><span aria-hidden=\"true\" class=\"autool-compare-matrix__category-progress\" data-autool-progress-order-ready=\"yes\" data-compare-category-progress=\"\"><span class=\"autool-compare-matrix__category-progress-label\">Slide \/ drag<\/span><span class=\"autool-compare-matrix__category-progress-meter\"><span class=\"autool-compare-matrix__category-progress-bar\"><\/span><\/span><span class=\"autool-compare-matrix__category-progress-count\" data-compare-category-count=\"\">1 \/ 1<\/span><\/span><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-3\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Accessory Connectors<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">7 Types<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">7 Types<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">7 Types<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Check the selected package contents for included adapter types and quantities.<\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-3\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Equipped Toolbox<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"No\" class=\"autool-compare-matrix__mark\" data-autool-state=\"no\" data-layout43-marker=\"\" role=\"img\">\u00d7<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\"><span aria-label=\"Yes\" class=\"autool-compare-matrix__mark\" data-autool-state=\"yes\" data-layout43-marker=\"\" role=\"img\">\u2713<\/span><\/div><\/td>\r\n<\/tr><tr data-compare-group=\"layout-group-3\" data-compare-row=\"\">\r\n<th class=\"autool-compare-matrix__feature\" scope=\"row\">Applicable Scenarios<\/th>\r\n<td data-compare-model=\"pt503\"><div class=\"autool-compare-matrix__value\">Intake Manifold<br\/>Brake Booster<br\/>Crankcase<br\/>(Non-corrosive Oil, Water, Air, Natural Gas)<\/div><\/td>\r\n<td data-compare-model=\"pt520\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Intake Manifold<br\/>Brake Booster<br\/>Crankcase<br\/>(Non-corrosive Oil, Water, Air, Natural Gas)<\/div><\/td>\r\n<td data-compare-model=\"pt530\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Intake Manifold<br\/>Brake Booster<br\/>Crankcase<br\/>(Non-corrosive Oil, Water, Air, Natural Gas)<\/div><\/td>\r\n<td data-compare-model=\"pt660\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Internal brake-system fluid pressure; two-position\/caliper comparison<\/div><\/td>\r\n<\/tr><\/tbody>\r\n<\/table>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--cool autool-section--downloads\" data-autool-surface=\"cool\" id=\"autool-download\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Manual &amp; Support<\/p>\r\n<h2 class=\"autool-title\">Find the Manual and Adapter Guidance<\/h2><\/header><div aria-label=\"PT503 manual download and setup support\" class=\"autool-product-rail autool-resources-grid autool-mobile-rail\" data-autool-rail=\"resources\">\r\n<article class=\"autool-resource-download autool-resource-panel\"><div class=\"autool-resource-media\">\r\n<img decoding=\"async\" alt=\"AUTOOL PT503 mini differential pressure gauge manual preview\" loading=\"lazy\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2025\/07\/Mini-Differential-Pressure-Gauge15.png\"\/>\r\n<\/div><div class=\"autool-resource-body\"><span class=\"autool-resource-meta\">Manual \/ PDF<\/span><h3>AUTOOL PT503 User Manual<\/h3><p>Open the PDF manual for AUTOOL PT503 pressure type and unit selection, adapter setup, data hold, result interpretation, safe connection and troubleshooting support.<\/p><div class=\"autool-resource-actions\"><a class=\"autool-product-button\" href=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2025\/07\/AUTOOL-PT503-MANUAL-EN-DE-1-1.pdf\" rel=\"noopener\" target=\"_blank\">Download Manual<\/a><\/div><\/div><\/article><aside class=\"autool-resource-panel autool-section--support\" id=\"autool-support\"><div class=\"autool-resource-body\"><span class=\"autool-resource-meta\">Setup Help<\/span><h3>Need Help Choosing the Right Setup?<\/h3><p>Contact AUTOOL Store before ordering for help with manual versions, installation steps, compatibility, accessories, safe-use instructions, or after-sales support.<\/p><dl class=\"autool-support-list\"><div><dt>Email<\/dt><dd><a href=\"mailto:support@autoolstore.com\">support@autoolstore.com<\/a><\/dd><\/div><div><dt>WhatsApp<\/dt><dd><a href=\"https:\/\/wa.me\/8618926477404\" target=\"_blank\" rel=\"noopener\">+86 189 2647 7404<\/a><\/dd><\/div><\/dl><div class=\"autool-resource-actions\"><a class=\"autool-product-button\" href=\"mailto:support@autoolstore.com\">EMAIL<\/a><a class=\"autool-product-button\" href=\"https:\/\/wa.me\/8618926477404\" rel=\"noopener\" target=\"_blank\">WHATSAPP<\/a><\/div><\/div><\/aside>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--warm autool-section--package\" data-autool-surface=\"warm\" id=\"autool-box\"><div class=\"autool-layout-container\">\r\n<div class=\"autool-package-layout\">\r\n<figure class=\"autool-package-media\">\r\n<img decoding=\"async\" alt=\"AUTOOL PT503 packing list with main unit manual retail box adapters and hose\" loading=\"lazy\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2025\/10\/a0afe4d0-2904-46ee-9eba-aebd9d98795a.png\"\/>\r\n<\/figure>\r\n<div class=\"autool-package-copy\"><p class=\"autool-subhead\">Package Contents<\/p>\r\n<h2 class=\"autool-title\">See What Comes in the Box<\/h2><ul aria-label=\"PT503 package contents\" class=\"autool-package-list autool-product-rail\" data-autool-rail=\"package\">\r\n<li>\r\n<span>Main Unit<\/span><strong>AUTOOL PT503 mini differential pressure gauge<\/strong><\/li>\r\n<li>\r\n<span>Documentation<\/span><strong>AUTOOL PT503 user manual<\/strong><\/li>\r\n<li>\r\n<span>Package<\/span><strong>Retail box<\/strong><\/li>\r\n<li>\r\n<span>Adapters<\/span><strong>Measurement adapters<\/strong><\/li>\r\n<li>\r\n<span>Hose \/ Tubing<\/span><strong>Measurement hose and tubing<\/strong><\/li>\r\n<li>\r\n<span>Item<\/span><strong>Main unit: 3-year warranty. Standard accessories: 1-year warranty. Warranty Policy.<\/strong><\/li>\r\n<\/ul><\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--white autool-section--faq\" data-autool-nav=\"FAQ\" data-autool-surface=\"white\" id=\"autool-faq-description\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Buyer Questions<\/p>\r\n<h2 class=\"autool-title\">Pressure Connection and Reading Questions<\/h2><\/header><div class=\"autool-faq-grid\">\r\n<details><summary>What Pressure Types Can PT503 Measure?<\/summary><div class=\"autool-faq-answer\"><p>PT503 can measure positive pressure, negative pressure, and differential pressure. It is suitable for compact automotive diagnostic pressure checks when the pressure range and connector setup match the test point.<\/p><\/div><\/details><details><summary>What Is The Measurement Range Of PT503?<\/summary><div class=\"autool-faq-answer\"><p>The PT503 testing range is -101kPa ~ 200kPa. Its accuracy is up to \u00b10.5%FS, and its kPa resolution is 0.1kPa.<\/p><\/div><\/details><details><summary>What Pressure Units Does PT503 Support?<\/summary><div class=\"autool-faq-answer\"><p>PT503 supports 6 pressure units: psi, inHg, kPa, mbar, bar, and mmHg. Switch to the correct unit before recording or comparing readings.<\/p><\/div><\/details><details><summary>What Batteries Does PT503 Use?<\/summary><div class=\"autool-faq-answer\"><p>PT503 uses 2 \u00d7 1.5V AAA batteries. Replace the batteries if the battery indicator flashes, the display becomes unstable, or the gauge cannot operate normally.<\/p><\/div><\/details><details><summary>Can PT503 Lock Measurement Data?<\/summary><div class=\"autool-faq-answer\"><p>Yes. PT503 supports a data hold function. Use it to lock the current reading when you need to record, compare, or report the pressure value.<\/p><\/div><\/details><details><summary>How Do I Switch Units Or Use The Backlight?<\/summary><div class=\"autool-faq-answer\"><p>Use the unit function to switch between psi, inHg, kPa, mbar, bar, and mmHg. Use the backlight function when the working area is dim. Refer to the PT503 manual for the exact key operation sequence.<\/p><\/div><\/details><details><summary>Can I Power On PT503 While Pressure Is Applied?<\/summary><div class=\"autool-faq-answer\"><p>No. Power on the gauge without pressure applied. PT503 performs startup zeroing and atmospheric pressure calibration, so powering on under pressure may cause inaccurate measurements.<\/p><\/div><\/details><details><summary>What Should I Check Before Measurement?<\/summary><div class=\"autool-faq-answer\"><p>Check the batteries, hose, adapter, connector fit, and pressure range before testing. Avoid squeezing the silicone tube, and do not use the gauge beyond the 200kPa maximum range.<\/p><\/div><\/details><details><summary>What Is The Difference Between PT503, PT520, And PT530?<\/summary><div class=\"autool-faq-answer\"><p>PT503 focuses on mini portability and quick field testing. PT520 is a larger digital manometer option with a bigger display, data storage, and higher accuracy. PT530 is the higher-level option with a wider -100~300kPa range, higher \u00b10.25%FS accuracy, storage support, magnetic back, button light, and tool box configuration.<\/p><\/div><\/details>\r\n<\/div>\r\n<\/div><\/section><\/main><\/div>\r\n\r\n","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>\n","protected":false},"featured_media":62573,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[448],"product_cat":[1063,1069],"product_tag":[940,939,1038,960],"hf_cat_product":[4541],"class_list":["post-58535","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-automotive-repair-testing-equipment","product_cat-engine-pressure-tester","product_tag-measurement-tools","product_tag-multi-warehouse-shipping","product_tag-new-arrival","product_tag-pressure-testing","first","instock","shipping-taxable","purchasable","product-type-variable"],"meta_box":{"autool_archive_segment":"Pressure testing","autool_primary_use_case":"Pressure testing for engine, fuel, air or cooling systems","autool_customer_focus":["measurement accuracy","warehouse \/ delivery location"],"autool_source_summary":"- Pressure Checks Made Clear: Built for targeted pressure diagnosis in fuel, oil, cooling, or air systems where confirmation matters before repair. - Decision Points Up Front: The short description is structured to surfa","autool_model_family":"PT503","autool_voltage_options":"","autool_ship_from_options":"Germany\u3001United States\u3001United Kingdom\u3001China","autool_package_options":"","autool_accessory_options":"","autool_data_confidence":"site-content-derived","autool_manual_review_notes":""},"_links":{"self":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product\/58535","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/comments?post=58535"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media\/62573"}],"wp:attachment":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media?parent=58535"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_brand?post=58535"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_cat?post=58535"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_tag?post=58535"},{"taxonomy":"hf_cat_product","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/hf_cat_product?post=58535"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}