{"id":10524,"date":"2026-09-30T10:37:59","date_gmt":"2026-09-30T10:37:59","guid":{"rendered":"https:\/\/shop.autoboss.com\/?post_type=product&#038;p=10524"},"modified":"2026-10-09T04:12:37","modified_gmt":"2026-10-09T04:12:37","slug":"autool-as501-digital-brake-fluid-tester","status":"publish","type":"product","link":"https:\/\/autoboss.com\/es\/product\/autool-as501-digital-brake-fluid-tester\/","title":{"rendered":"AUTOOL AS501 Digital Brake Fluid Tester for DOT &#038; ENV Fluids"},"content":{"rendered":"<div class=\"abd-pd\" data-abd-version=\"1\">\n<header class=\"abd-hero\">\n<h3>Screen Brake-Fluid Water Content in Tight Reservoirs<\/h3>\n<p class=\"abd-lead\">Select the matching DOT or ENV mode, reach into the reservoir with the flexible probe and read water content and fluid grade on the backlit display. The result is a quick screening value, not a standardized wet boiling-point test.<\/p>\n<ul class=\"abd-facts\">\n<li>6 Fluid Modes<\/li>\n<li>About 10 s per Test<\/li>\n<li>260 mm Flexible Probe<\/li>\n<li>1.8-Inch Backlit Display<\/li>\n<li>2 \u00d7 AA Power<\/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>Six Fluid Modes<\/h5>\n<p>Choose DOT 3, DOT 4, DOT 5, DOT 5.1, ENV 4 or ENV 6 before testing so the result uses the intended fluid setting.<\/p>\n<\/li>\n<li>\n<h5>Water Content and Fluid Grade<\/h5>\n<p>Each test shows the water-content percentage together with a fluid grade.<\/p>\n<\/li>\n<li>\n<h5>Flexible Gooseneck Probe<\/h5>\n<p>Reaches confined reservoir openings while the handheld display stays in view.<\/p>\n<\/li>\n<li>\n<h5>Backlit Screen<\/h5>\n<p>Keeps the selected mode and result readable in bright or dim service areas.<\/p>\n<\/li>\n<li>\n<h5>No Vehicle Connection Needed<\/h5>\n<p>Two AA batteries power the tester.<\/p>\n<\/li>\n<\/ol>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-compare\">\n<h4>AS501 vs AS502<\/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\">AS501<\/th>\n<th scope=\"col\">AS502<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<th scope=\"row\">Fluid types<\/th>\n<td class=\"is-current\">6: DOT 3, DOT 4, DOT 5, DOT 5.1, ENV 4, ENV 6<\/td>\n<td>3: DOT 3, DOT 4, DOT 5.1<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Test modes<\/th>\n<td class=\"is-current\">Normal<\/td>\n<td>Normal \/ Expert<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Display<\/th>\n<td class=\"is-current\">1.8-inch backlit<\/td>\n<td>2.8-inch backlit<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Supply voltage<\/th>\n<td class=\"is-current\">3V<\/td>\n<td>6V<\/td>\n<\/tr>\n<tr>\n<th scope=\"row\">Hose material<\/th>\n<td class=\"is-current\">Iron oxide<\/td>\n<td>304 stainless steel<\/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>AS501 brake fluid tester<\/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\/1aa5ac9b6abbb6843873c49b.png\" alt=\"AUTOOL AS501 brake fluid tester with flexible probe, retail box and user manual\" width=\"1200\" height=\"1200\" loading=\"lazy\"><figcaption>AS501 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>Confirm the fluid<\/b><span>Identify the exact fluid family and select the matching mode.<\/span><\/li>\n<li><b>Prepare the probe<\/b><span>Power the tester and clean the probe so residue from another fluid cannot affect the sample.<\/span><\/li>\n<li><b>Take the reading<\/b><span>Immerse the probe as directed and hold it steady until the result is complete.<\/span><\/li>\n<li><b>Interpret the result<\/b><span>Compare the water-content percentage and fluid grade with the applicable service information.<\/span><\/li>\n<li><b>Clean and store<\/b><span>Clean the probe promptly with the approved method and store the tester dry.<\/span><\/li>\n<\/ol>\n<p class=\"abd-note\">Mode selection, testing and troubleshooting: <a href=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/d5797377966de663e5ccefc3.pdf\" target=\"_blank\" rel=\"noopener\">AS501 user manual (PDF)<\/a>.<\/p>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Six Brake-Fluid Modes:<\/strong> Select DOT 3, DOT 4, DOT 5, DOT 5.1, ENV 4, or ENV 6 before testing.<\/li>\n<li><strong>About 10 Seconds:<\/strong> Complete a test cycle in about 10 seconds and view water-content and fluid-grade results.<\/li>\n<li><strong>260 mm Flexible Probe:<\/strong> Reach confined reservoir openings while keeping the handheld display visible.<\/li>\n<li><strong>1.8-Inch Backlit Display:<\/strong> Read the selected fluid mode and completed result in bright or dim service areas.<\/li>\n<li><strong>Portable AA Power:<\/strong> Run the tester from two 1.5 V AA batteries without connecting to the vehicle.<\/li>\n<\/ul>","protected":false},"featured_media":12757,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[128],"product_cat":[99],"product_tag":[],"class_list":["post-10524","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-fluid-testers","first","instock","shipping-taxable","purchasable","product-type-simple"],"_links":{"self":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product\/10524","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product"}],"about":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/types\/product"}],"replies":[{"embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/comments?post=10524"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/media\/12757"}],"wp:attachment":[{"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/media?parent=10524"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_brand?post=10524"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_cat?post=10524"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoboss.com\/es\/wp-json\/wp\/v2\/product_tag?post=10524"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}