{"id":10506,"date":"2026-09-30T10:37:59","date_gmt":"2026-09-30T10:37:59","guid":{"rendered":"https:\/\/shop.autoboss.com\/?post_type=product&#038;p=10506"},"modified":"2026-10-09T08:20:30","modified_gmt":"2026-10-09T08:20:30","slug":"autool-sml400-digital-automotive-smoke-tester-with-180-second-pressure-hold","status":"publish","type":"product","link":"https:\/\/autoboss.com\/de\/product\/autool-sml400-digital-automotive-smoke-tester-with-180-second-pressure-hold\/","title":{"rendered":"AUTOOL SML400 Digital Smoke Leak Detector with 180-Second Pressure Hold"},"content":{"rendered":"<div class=\"abd-pd\" data-abd-version=\"1\">\n<header class=\"abd-hero\">\n<h3>Run a Timed Pressure-Hold Check, Then Trace the Leak With Smoke<\/h3>\n<p class=\"abd-lead\">The SML400 runs an automatic 180-second pressure-hold routine and shows a PASS or ERR result, then switches to Smoke mode so you can see where air escapes. Its built-in pump runs from 12 V, so no shop air is needed; set pressure from the vehicle procedure, not the machine&#8217;s maximum.<\/p>\n<ul class=\"abd-facts\">\n<li>180 s Pressure Hold<\/li>\n<li>PASS \/ ERR Result<\/li>\n<li>Built-In Pump<\/li>\n<li>Air, Hold &amp; Smoke Modes<\/li>\n<li>Expanded Adapter Kit<\/li>\n<\/ul>\n<\/header>\n<section class=\"abd-sec\" id=\"abd-features\">\n<h4>Hauptmerkmale<\/h4>\n<ol class=\"abd-features\">\n<li>\n<h5>Three Test Modes<\/h5>\n<p>Run Air mode or the three-minute pressure-hold routine first, then use Smoke mode to inspect an indicated escape path.<\/p>\n<\/li>\n<li>\n<h5>Countdown and Result on Screen<\/h5>\n<p>The display shows the hold countdown and the routine&#8217;s PASS or ERR result for the configured sealed test.<\/p>\n<\/li>\n<li>\n<h5>Separate Pressure and Flow Readings<\/h5>\n<p>Read pressure on the gauge and delivery on the flow meter while filling and checking the test volume.<\/p>\n<\/li>\n<li>\n<h5>Adjustable Built-In Air<\/h5>\n<p>The internal pump supplies test air from the 12 V connection; adjust pressure and flow gradually to the permitted values.<\/p>\n<\/li>\n<li>\n<h5>Oil Level Gauge and Drain Valve<\/h5>\n<p>Check the oil level before use and drain aged or excess fluid before refilling or storage.<\/p>\n<\/li>\n<li>\n<h5>Overheat Protection<\/h5>\n<p>Operation stops when the unit reaches its protection temperature; let it cool before continuing.<\/p>\n<\/li>\n<\/ol>\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><b class=\"abd-qty\">1\u00d7<\/b>SML400 main unit<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Power cable for vehicle-battery connection<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Smoke output hose<\/li>\n<li><b class=\"abd-qty\">2\u00d7<\/b>Conical adapters<\/li>\n<li><b class=\"abd-qty\">2\u00d7<\/b>Universal airbag adapters<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Valve-core wrench<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>EVAP service-port connector<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Graduated oil-filling bottle<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Set of universal hard rubber plugs<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Set of red cap plugs<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Universal soft rubber plug<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>BMW oil-cap adapter set<\/li>\n<li><b class=\"abd-qty\">1\u00d7<\/b>Bedienungsanleitung<\/li>\n<\/ul>\n<figure class=\"abd-fig\"><img decoding=\"async\" src=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/217021ac209b599e6544e944.jpg\" alt=\"AUTOOL SML400 smoke leak detector with power clamps, smoke hose, cone adapters, plugs, oil bottle, EVAP connector, oil-cap adapter, airbag adapters, valve-core wrench and user manual\" width=\"1200\" height=\"1200\" loading=\"lazy\"><figcaption>SML400 package layout.<\/figcaption><\/figure>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-use\">\n<h4>Anwendung<\/h4>\n<ol class=\"abd-steps\">\n<li><b>Confirm the procedure<\/b><span>Identify the target system, permitted pressure, access point, valve state and openings to seal.<\/span><\/li>\n<li><b>Prepare the machine<\/b><span>Inspect the power lead, hose and adapters, and add or confirm only the smoke oil specified in the manual.<\/span><\/li>\n<li><b>Connect and isolate<\/b><span>Seal the correct adapter to the test point and close normal escape paths per the vehicle procedure.<\/span><\/li>\n<li><b>Run Air or Pressure mode<\/b><span>Observe the gauge or display result under the selected test conditions.<\/span><\/li>\n<li><b>Trace with smoke<\/b><span>Switch to Smoke mode, let the volume fill, and inspect joints, hoses and seals for escaping smoke.<\/span><\/li>\n<li><b>Repair and retest<\/b><span>Repair the confirmed leak and repeat the same controlled test.<\/span><\/li>\n<\/ol>\n<p class=\"abd-note\">Pressure-hold tests, smoke tracing, oil care and troubleshooting: <a href=\"https:\/\/autoboss.com\/wp-content\/uploads\/autool-catalog\/media\/c905f6ad5c25e88387ec8482.pdf\" target=\"_blank\" rel=\"noopener\">SML400 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 apply the machine&#8217;s maximum output to every system; use the OEM or component procedure and the lowest appropriate setting.<\/li>\n<li>Use only approved smoke machine fluid; never water, viscous or corrosive liquids.<\/li>\n<li>Do not operate with damaged power leads, hoses or adapters, and clean an opening before inserting an airbag adapter so sharp edges cannot puncture it.<\/li>\n<li>Work in a dry, well-ventilated area away from flames and heat, wear eye and hand protection, and keep smoke away from sensitive electronics.<\/li>\n<\/ul>\n<\/div>\n<\/div>\n<\/section>\n<section class=\"abd-sec\" id=\"abd-faq\">\n<h4>FAQ<\/h4>\n<details class=\"abd-faq\" name=\"abd-faq\">\n<summary>Can I use the maximum pressure on an EVAP system?<\/summary>\n<p>Do not assume so. Machine capacity and EVAP-safe pressure are different facts; choose pressure from the vehicle procedure.<\/p>\n<\/details>\n<details class=\"abd-faq\" name=\"abd-faq\">\n<summary>What if no smoke is visible?<\/summary>\n<p>Verify smoke delivery, access, isolation, adapter sealing and valve state, then continue with functional diagnosis; blockage, intermittent or non-leak faults may not produce visible smoke.<\/p>\n<\/details>\n<details class=\"abd-faq\" name=\"abd-faq\">\n<summary>Does a visible leak guarantee the entire repair?<\/summary>\n<p>It identifies an area to inspect and confirm. Repair the verified problem, repeat the test and complete any required vehicle checks.<\/p>\n<\/details>\n<\/section>\n<\/div>","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>180-Second Pressure-Hold Test:<\/strong> Run the automatic three-minute hold routine and view its countdown and PASS or ERR result on the TFT display.<\/li>\n<li><strong>Smoke Leak Location:<\/strong> After the air or hold stage, use Smoke mode to inspect an indicated escape path.<\/li>\n<li><strong>Pressure + Flow Monitoring:<\/strong> View pressure and delivery on separate gauge and flow-meter indications while filling the test volume.<\/li>\n<li><strong>Adjustable Built-In Air:<\/strong> Use the internal 12 V pump and gradually adjust pressure and flow to the permitted procedure values.<\/li>\n<li><strong>Expanded Sealing Kit:<\/strong> Cone, inflatable-airbag, EVAP, plug, and BMW oil-cap adapters connect and seal different compatible openings.<\/li>\n<\/ul>","protected":false},"featured_media":12752,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[128],"product_cat":[54],"product_tag":[],"class_list":["post-10506","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-automotive-pipe-leak-detection","first","instock","sale","shipping-taxable","purchasable","product-type-variable"],"_links":{"self":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product\/10506","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=10506"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media\/12752"}],"wp:attachment":[{"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/media?parent=10506"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_brand?post=10506"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_cat?post=10506"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoboss.com\/de\/wp-json\/wp\/v2\/product_tag?post=10506"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}