{"id":25118,"date":"2021-06-03T20:27:29","date_gmt":"2021-06-03T12:27:29","guid":{"rendered":"https:\/\/autoolstore.com\/product\/autool-lm120-refrigeration-manifold-digital-hvac-cold-medium-vacuum-pressure-temp-car-air-conditioning-tester-pk-testo-dy517a\/"},"modified":"2026-09-20T08:28:34","modified_gmt":"2026-09-20T16:28:34","slug":"autool-lm120-ac-manifold-gauge-refrigerant-identifier","status":"publish","type":"product","link":"https:\/\/autoolstore.com\/product\/autool-lm120-ac-manifold-gauge-refrigerant-identifier\/","title":{"rendered":"AUTOOL LM120 Digital Manifold 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=\"lm120-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 LM120 \u00b7 Dual-Pressure Digital Manifold Gauge with Temperature Inputs<\/p>\r\n<h2 class=\"autool-product-hero__title\">Control Both Sides and Calculate SH\/SC<\/h2>\r\n<p class=\"autool-product-hero__lead\">Measure high- and low-side pressure across 0\u20136 MPa, monitor relative vacuum and support refrigerant charging with this digital manifold gauge. Compatible clamp probes, included only in selected packages or purchased separately, provide -40\u00b0C to 150\u00b0C pipe-temperature readings and enable superheat\/subcooling calculations with the correct refrigerant selected. Timed pressure retention, 1\/4-inch interfaces, valves and a backlit display support daily service.<\/p>\r\n<ul aria-label=\"AUTOOL LM120 key benefits\" class=\"autool-product-hero__capabilities\">\r\n<li>0\u20136 MPa Gauge Pressure<\/li>\r\n<li>-40\u00b0C to 150\u00b0C with Probes<\/li>\r\n<li>Superheat \/ Subcooling<\/li>\r\n<li>Timed Pressure Retention<\/li>\r\n<li>1\/4-Inch Connections<\/li>\r\n<\/ul>\r\n<nav aria-label=\"AUTOOL LM120 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 LM120 digital manifold gauge used for A\/C pressure temperature leak test and refrigerant filling\" decoding=\"async\" fetchpriority=\"high\" loading=\"eager\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2023\/05\/AUTOOL-LM120-AC-Manifold-Gauge-Refrigerant-Identifier.jpg\"\/><\/figure>\r\n<\/div><\/section><aside aria-label=\"AUTOOL LM120 at a glance\" class=\"autool-product-metrics\"><div class=\"autool-product-metrics__inner\">\r\n<div class=\"autool-product-metric\">\r\n<strong>-101\u20136000 kPa<\/strong><span>Gauge Pressure Coverage<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>1\/4 in<\/strong><span>Standard Interface<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>4 \u00d7 AA<\/strong><span>Battery Power<\/span>\r\n<\/div>\r\n<div class=\"autool-product-metric\">\r\n<strong>950 g<\/strong><span>Main Unit Weight<\/span>\r\n<\/div>\r\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\">Pressure and Two Temperature Inputs on One Display<\/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>Dual Pressure Measurement<\/h3><p>Read high- and low-side gauge pressure together with dual temperature measurement during installation, testing, and service.<\/p><\/article><article class=\"autool-product-card\"><h3>Dual Display Temperatures<\/h3><p>Display two pipe temperatures when compatible clamp probes are connected and seated correctly.<\/p><\/article><article class=\"autool-product-card\"><h3>Probe Temperature Range<\/h3><p>Temperature measurement range: -40\u00b0C to 150\u00b0C with compatible clamp probes.<\/p><\/article><article class=\"autool-product-card\"><h3>Superheat And Subcooling Support<\/h3>\r\n<p>With the correct refrigerant selected and compatible probes connected, calculate SH and SC from pressure and pipe-temperature data.<\/p><\/article><article class=\"autool-product-card\"><h3>Vacuum Monitoring<\/h3>\r\n<p>Follow relative vacuum during an approved evacuation procedure before charging.<\/p><\/article><article class=\"autool-product-card\"><h3>Timed Pressure-Retention Test<\/h3><p>View initial pressure, current pressure, pressure difference and elapsed time to assess system tightness. Pressure inspection, refrigerant filling assistance and vacuum monitoring support the service sequence, with switchable pressure and \u00b0C\/\u00b0F units.<\/p><\/article><article class=\"autool-product-card\"><h3>Refrigerant Charging Assistance<\/h3><p>The built-in 32-bit digital processing unit and refrigerant database support direct reading of operating data and calculation of superheat and subcooling when required accessories are connected. Use selected refrigerant data, readings, valves and properly rated hoses to support the equipment-specific charging procedure.<\/p><\/article><article class=\"autool-product-card\"><h3>Backlit Multi-Unit Display<\/h3><p>Read service data on the large backlit LCD and switch pressure or \u00b0C\/\u00b0F units to match the procedure.<\/p><\/article><article class=\"autool-product-card\"><h3>Durable Service Controls<\/h3><p>High-strength engineering plastic, flexible non-slip silicone grip, long-life valve switches, and 1\/4-inch standard interface improve durability and versatility.<\/p><\/article>\r\n<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\">How to Use<\/p>\r\n<h2 class=\"autool-title\">Connect, Select Refrigerant, Stabilize, and Compare<\/h2><\/header><div class=\"autool-workflow\" data-autool-workflow=\"\" data-workflow-mode=\"panels\">\r\n<div aria-label=\"lm120 workflow\" class=\"autool-workflow__tabs\" data-workflow-tabs=\"\" role=\"tablist\">\r\n<button aria-controls=\"lm120-panel-0\" aria-selected=\"true\" class=\"autool-workflow__tab\" data-workflow-step=\"0\" id=\"lm120-tab-0\" role=\"tab\" tabindex=\"0\" type=\"button\">01<br\/><wbr\/>Confirm<wbr\/> Refrigerant<wbr\/> And<wbr\/> Ratings<\/button><button aria-controls=\"lm120-panel-1\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"1\" id=\"lm120-tab-1\" role=\"tab\" tabindex=\"-1\" type=\"button\">02<br\/><wbr\/>Inspect<wbr\/> And<wbr\/> Zero<\/button><button aria-controls=\"lm120-panel-2\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"2\" id=\"lm120-tab-2\" role=\"tab\" tabindex=\"-1\" type=\"button\">03<br\/><wbr\/>Connect<wbr\/> By<wbr\/> Flow<wbr\/> Direction<\/button><button aria-controls=\"lm120-panel-3\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"3\" id=\"lm120-tab-3\" role=\"tab\" tabindex=\"-1\" type=\"button\">04<br\/><wbr\/>Run<wbr\/> The<wbr\/> Required<wbr\/> Mode<\/button><button aria-controls=\"lm120-panel-4\" aria-selected=\"false\" class=\"autool-workflow__tab\" data-workflow-step=\"4\" id=\"lm120-tab-4\" role=\"tab\" tabindex=\"-1\" type=\"button\">05<br\/><wbr\/>Close,<wbr\/> Verify<wbr\/> And<wbr\/> Disconnect<\/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 \/ 5<\/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=\"lm120-tab-0\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" id=\"lm120-panel-0\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">01<\/div>\r\n<h3 class=\"autool-workflow__title\">Confirm Refrigerant And Ratings<\/h3>\r\n<p class=\"autool-workflow__description\">Identify the system refrigerant from reliable vehicle\/equipment information and check the gauge, hose and system pressure limits.<\/p><\/article><article aria-labelledby=\"lm120-tab-1\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"lm120-panel-1\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">02<\/div>\r\n<h3 class=\"autool-workflow__title\">Inspect And Zero<\/h3>\r\n<p class=\"autool-workflow__description\">Close both valves, inspect hoses and fittings, power on, choose the mode\/units\/refrigerant and zero residual pressure if required.<\/p><\/article><article aria-labelledby=\"lm120-tab-2\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"lm120-panel-2\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">03<\/div>\r\n<h3 class=\"autool-workflow__title\">Connect By Flow Direction<\/h3>\r\n<p class=\"autool-workflow__description\">Attach the correct hose ends and service ports according to the manual and system procedure.<\/p><\/article><article aria-labelledby=\"lm120-tab-3\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"lm120-panel-3\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">04<\/div>\r\n<h3 class=\"autool-workflow__title\">Run The Required Mode<\/h3>\r\n<p class=\"autool-workflow__description\">Use pressure\/refrigerant mode, vacuum mode or the timed pressure-retention test; fully seat compatible temperature probes when SH\/SC is needed.<\/p><\/article><article aria-labelledby=\"lm120-tab-4\" class=\"autool-workflow__panel\" data-workflow-panel=\"\" hidden=\"\" id=\"lm120-panel-4\" role=\"tabpanel\" tabindex=\"0\"><div class=\"autool-workflow__number\">05<\/div>\r\n<h3 class=\"autool-workflow__title\">Close, Verify And Disconnect<\/h3>\r\n<p class=\"autool-workflow__description\">Close the valves in the required order, let high-side pressure reach a safe point, review results and disconnect using the approved procedure.<\/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>Before You Start<\/h3>\r\n<ul class=\"autool-workflow__checks\">\r\n<li>The working measurement span, 10 MPa instrument limit, 600 PSI hose working rating and 3000 PSI hose limit are separate values.<\/li>\r\n<li>Select the known refrigerant before interpreting readings or charging.<\/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\">Safety &amp; Compatibility<\/p>\r\n<h2 class=\"autool-title\">Match Refrigerant, Hose, Port, and Pressure<\/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 Confuse Limits<\/h3>\r\n<p>The working measurement span, 10 MPa instrument limit, 600 PSI hose working rating and 3000 PSI hose limit are separate values.<\/p><\/article><article class=\"autool-product-card\"><h3>Confirm Refrigerant Identity<\/h3>\r\n<p>Select the known refrigerant in LM120 before interpreting pressure and temperature data or charging.<\/p><\/article><article class=\"autool-product-card\"><h3>Inspect Hoses And Fittings<\/h3>\r\n<p>Replace damaged hoses, seals or fittings and use a suitably rated hose if the supplied one does not meet the job.<\/p><\/article><article class=\"autool-product-card\"><h3>Use PPE And Ventilation<\/h3>\r\n<p>Wear appropriate protection, ventilate the work area and keep the instrument away from heat, humidity, ignition hazards and strong electromagnetic fields.<\/p><\/article><article class=\"autool-product-card\"><h3>Follow Equipment Procedures<\/h3>\r\n<p>Different systems and refrigerants require different connection and charging sequences; follow the current manual and equipment maker&#8217;s instructions.<\/p><\/article>\r\n<article class=\"autool-product-card\"><h3>Restricted Operating Environments<\/h3><p>Do not use or store the instrument in high temperature, high humidity, flammable, explosive, or strong electromagnetic field environments.<\/p><\/article><article class=\"autool-product-card\"><h3>No Circuit Modifications<\/h3><p>Do not modify the internal circuit, because it may damage the instrument or create danger.<\/p><\/article><article class=\"autool-product-card\"><h3>Inspect Leak-Test Connections<\/h3><p>Check pipe fittings, hoses, and valve stems before leak testing. Replace damaged parts immediately.<\/p><\/article><article class=\"autool-product-card\"><h3>Follow Refrigerant Procedures<\/h3><p>During refrigerant filling, follow the specific operation requirements of the equipment and refrigerant to avoid damage to the user or equipment.<\/p><\/article><article class=\"autool-product-card\"><h3>Release Pressure Before Disconnecting<\/h3><p>Do not remove the high-pressure valve connection until the pressure drops to a safe point.<\/p><\/article><\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--white\" data-autool-surface=\"white\" id=\"autool-results\"><div class=\"autool-layout-container\">\r\n<header class=\"autool-section-head\"><p class=\"autool-subhead\">Test Results<\/p>\r\n<h2 class=\"autool-title\">Read Paired Pressure and Temperature Values<\/h2><\/header><div class=\"autool-product-grid autool-product-grid--3 autool-product-rail\" data-autool-rail=\"results\">\r\n<article class=\"autool-product-card\"><h3>High\/Low Pressure Pair<\/h3>\r\n<p>Interpret high- and low-side pressure with refrigerant, temperature and operating condition.<\/p><\/article><article class=\"autool-product-card\"><h3>Superheat\/<wbr\/>Subcooling<\/h3>\r\n<p>Only interpret SH\/SC when the correct refrigerant is selected and probes have stable full pipe contact.<\/p><\/article><article class=\"autool-product-card\"><h3>Pressure Difference Over Time<\/h3>\r\n<p>A changing retained pressure can indicate a setup or system-sealing issue; repeat the setup check and use a separate approved method to locate the cause.<\/p><\/article><article class=\"autool-product-card\"><h3>Vacuum Trend<\/h3>\r\n<p>Compare the achieved\/stable vacuum with the service specification rather than using a universal runtime rule.<\/p><\/article>\r\n<\/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\">Compare Models<\/p>\r\n<h2 class=\"autool-title\">Choose the Manifold for the Service Task<\/h2><\/header><div class=\"autool-model-compare\" data-autool-model-compare=\"\" data-current-model=\"lm120\">\r\n<button aria-controls=\"compare46-01_lm120-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: LM120<\/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=\"compare46-01_lm120-compare-picker-title\" class=\"autool-model-compare__selector\" id=\"compare46-01_lm120-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=\"compare46-01_lm120-compare-picker-title\">Model Guide<\/h3>\r\n<p class=\"autool-model-compare__instruction\">Choose one or more models. LM120 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\"><label class=\"autool-model-option autool-is-selected\" data-model-card=\"lm120\" role=\"listitem\"><input checked=\"\" data-model-checkbox=\"\" type=\"checkbox\" value=\"lm120\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">LM120<\/strong><span class=\"autool-model-option__tier\">Digital manifold \/ Charging valves<\/span><\/span><span class=\"autool-model-option__current\">Current model<\/span><\/label><label class=\"autool-model-option\" data-model-card=\"lm120-plus\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"lm120-plus\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">LM120+<\/strong><span class=\"autool-model-option__tier\">Plus-kit manifold \/ Clamp support<\/span><\/span><\/label><label class=\"autool-model-option\" data-model-card=\"lm150\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"lm150\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">LM150<\/strong><span class=\"autool-model-option__tier\">93 profiles \/ 2 clamps<\/span><\/span><\/label><label class=\"autool-model-option\" data-model-card=\"lm160\" role=\"listitem\"><input data-model-checkbox=\"\" type=\"checkbox\" value=\"lm160\"\/><span class=\"autool-model-option__copy\"><strong class=\"autool-model-option__model\">LM160<\/strong><span class=\"autool-model-option__tier\">Program control \/ 8 languages<\/span><\/span><\/label><\/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=\"compare46-01_lm120-compare-result-status\" role=\"status\">LM120 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=\"compare46-01_lm120-compare-result-title\">LM120 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=\"compare46-01_lm120-compare-result-status\" aria-labelledby=\"compare46-01_lm120-compare-result-title\" class=\"autool-compare-matrix-wrap\" role=\"region\" tabindex=\"0\">\r\n<table class=\"autool-compare-matrix\" data-autool-columns=\"1\"><caption class=\"autool-table-caption--accessible\">Compare Your Options<\/caption><colgroup><col class=\"autool-compare-matrix__criteria-col\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"lm120\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"lm120-plus\" hidden=\"\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"lm150\" hidden=\"\"\/><col class=\"autool-compare-matrix__model-col\" data-compare-model=\"lm160\" hidden=\"\"\/><\/colgroup><thead><tr><th scope=\"col\">Choose For Your Task<\/th><th data-compare-model=\"lm120\" scope=\"col\">LM120<\/th><th data-compare-model=\"lm120-plus\" hidden=\"\" scope=\"col\">LM120+<\/th><th data-compare-model=\"lm150\" hidden=\"\" scope=\"col\">LM150<\/th><th data-compare-model=\"lm160\" hidden=\"\" scope=\"col\">LM160<\/th><\/tr><\/thead><tbody><tr class=\"autool-compare-matrix__category\" data-compare-category=\"comparison-group-1\">\r\n<th class=\"autool-compare-matrix__category-label\" scope=\"rowgroup\"><span class=\"autool-compare-matrix__category-label-inner\">Selection Criteria<\/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=\"comparison-group-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Core workflow<\/th><td data-compare-model=\"lm120\"><div class=\"autool-compare-matrix__value\">Pressure, vacuum, retention and charging assistance<\/div><\/td><td data-compare-model=\"lm120-plus\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Same core workflow with plus-kit configuration<\/div><\/td><td data-compare-model=\"lm150\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Advanced digital manifold workflow<\/div><\/td><td data-compare-model=\"lm160\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Program-controlled multilingual workflow<\/div><\/td><\/tr><tr data-compare-group=\"comparison-group-1\" data-compare-row=\"\"><th class=\"autool-compare-matrix__feature\" scope=\"row\">Temperature probes<\/th><td data-compare-model=\"lm120\"><div class=\"autool-compare-matrix__value\">Supported; inclusion varies<\/div><\/td><td data-compare-model=\"lm120-plus\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Supported; clamps not included in this configuration<\/div><\/td><td data-compare-model=\"lm150\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Two shown in package<\/div><\/td><td data-compare-model=\"lm160\" hidden=\"\"><div class=\"autool-compare-matrix__value\">Two shown in package<\/div><\/td><\/tr><\/tbody><\/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; Downloads<\/p>\r\n<h2 class=\"autool-title\">Use the Manual for Setup and Service<\/h2><\/header><div aria-label=\"AUTOOL LM120 manual download and setup support\" class=\"autool-resources-grid autool-product-rail autool-mobile-rail\" data-autool-rail=\"resources\">\r\n<article class=\"autool-resource-panel autool-resource-download\"><div class=\"autool-resource-media\"><img loading=\"lazy\" alt=\"AUTOOL LM120\/LM120+ user manual cover\" decoding=\"async\" height=\"300\" loading=\"lazy\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2024\/03\/autool-lm120-lm120-plus-user-manual-pdf.jpg\" width=\"212\"\/> <\/div><div class=\"autool-resource-body\"><span class=\"autool-resource-meta\">Manual \/ PDF<\/span><h3>AUTOOL LM120 User Manual<\/h3><p>Open the PDF manual for LM120 pressure and temperature measurement, superheat and subcooling calculations, vacuum checks, refrigerant charging, safety, and troubleshooting.<\/p><div class=\"autool-resource-actions\"><a class=\"autool-product-button\" href=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2024\/03\/autool-lm120-lm120-plus-user-manual.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\"><img alt=\"AUTOOL LM120 package contents\" decoding=\"async\" loading=\"lazy\" src=\"https:\/\/autoolstore.com\/wp-content\/uploads\/2021\/06\/AUTOOL-LM120-AC-Manifold-Gauge-Refrigerant-Identifier-8.jpg\"\/><\/figure><div class=\"autool-package-copy\"><p class=\"autool-subhead\">Package<\/p>\r\n<h2 class=\"autool-title\">What\u2019s Included<\/h2><ul aria-label=\"AUTOOL LM120 package contents\" class=\"autool-package-list autool-product-rail\" data-autool-rail=\"package\">\r\n<li>\r\n<span>LM120 Main Unit<\/span><strong>Digital AC manifold gauge.<\/strong>\r\n<\/li>\r\n<li>\r\n<span>Red, Blue And Yellow Hoses<\/span><strong>Color-coded service hoses; confirm the pressure rating and selected configuration.<\/strong>\r\n<\/li>\r\n<li>\r\n<span>Adapters\/Couplers<\/span><strong>Connection accessories; exact pieces require confirmation for the selected kit.<\/strong>\r\n<\/li>\r\n<li>\r\n<span>Storage Case<\/span><strong>Protective case.<\/strong>\r\n<\/li>\r\n<li>\r\n<span>Manual And Retail Box<\/span><strong>Documentation and retail packaging.<\/strong>\r\n<\/li>\r\n<li>\r\n<span>Temperature Probes And Batteries<\/span><strong>Do not assume inclusion; confirm the LM120 configuration. The instrument requires four AA batteries.<\/strong>\r\n<\/li>\r\n<\/ul><\/div>\r\n<\/div>\r\n<\/div><\/section><section class=\"autool-section autool-product-section--white\" 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\">FAQs<\/p>\r\n<h2 class=\"autool-title\">A\/C Manifold Gauge Connection and Reading Questions<\/h2><\/header><div class=\"autool-faq-grid\">\r\n<details><summary>Does LM120 identify refrigerant?<\/summary><div class=\"autool-faq-answer\"><p>Select the known refrigerant before interpreting readings or charging.<\/p><\/div><\/details><details><summary>What Is AUTOOL LM120 Used For?<\/summary><div class=\"autool-faq-answer\"><p>AUTOOL LM120 is a digital manifold gauge used as an auxiliary instrument for installing, testing, and maintaining refrigeration equipment such as automotive A\/C systems, air conditioners, and cold storage systems. It supports dual pressure testing, dual temperature testing, vacuum measurement, pressure leak testing, refrigerant filling assistance, and multi-unit conversion.<\/p><ul class=\"autool-feature-list\"><li>It measures high\/low gauge pressure, relative vacuum and compatible probe temperatures, and supports a timed pressure-retention test.<\/li><\/ul><\/div><\/details><details><summary>Can LM120 Calculate Superheat And Subcooling?<\/summary><div class=\"autool-faq-answer\"><p>Yes. LM120 calculates superheat and subcooling when the correct refrigerant is selected and compatible temperature probes are connected and fully seated. Probe availability depends on the selected package or model version.<\/p><\/div><\/details><details><summary>Can it locate a leak?<\/summary><div class=\"autool-faq-answer\"><p>No. A pressure-retention change can flag a sealing concern, but a separate approved method is needed to locate the cause.<\/p><\/div><\/details><details><summary>What Is The Standard Hose Pressure Rating?<\/summary><div class=\"autool-faq-answer\"><p>The standard hose maximum operating pressure is 600 PSI, about 4.13MPa \/ 41.3bar. The hose limit pressure is 3000 PSI, about 20.68MPa \/ 206.8bar. If the packed hose does not match your pressure requirement, use a suitable replacement hose.<\/p><ul class=\"autool-feature-list\"><li>Use the lowest applicable working rating among the system, gauge and hose; do not use instrument or hose limit figures as operating targets.<\/li><\/ul><\/div><\/details><details><summary>Are clamps included?<\/summary><div class=\"autool-faq-answer\"><p>Package configurations can differ. Confirm the selected LM120 kit rather than relying on a related-model comparison.<\/p><\/div><\/details><details><summary>What batteries are needed?<\/summary><div class=\"autool-faq-answer\"><p>Four 1.5 V AA\/LR6 batteries; confirm whether they ship in your region.<\/p><\/div><\/details><details><summary>How Many Refrigerants Does LM120 Support?<\/summary><div class=\"autool-faq-answer\"><p>The LM120 manual lists a built-in database of 89 refrigerants based on American NIST standard data. Some comparison materials may show different refrigerant counts by version, so confirm the current model version if the exact database count is critical for your use.<\/p><ul class=\"autool-feature-list\"><li>Both share the core manifold workflow. LM120+ is a separate configuration associated with the three-color hose set and two wired temperature-clamp support; verify each package before purchase.<\/li><\/ul><\/div><\/details>\r\n<details><summary>Does LM120 Measure Gauge Pressure Or Absolute Pressure?<\/summary><div class=\"autool-faq-answer\"><p>LM120 measures gauge pressure. Gauge pressure starts from atmospheric pressure, while absolute pressure starts from absolute vacuum. Confirm the tested system requirement before using the instrument.<\/p><\/div><\/details><details><summary>What Is The LM120 Pressure Range And Limit?<\/summary><div class=\"autool-faq-answer\"><p>The LM120 pressure measurement span is 0\u20136000 kPa, and its relative-vacuum span is -101\u20130 kPa. Overall coverage is -101 kPa to 6 MPa (approximately -1.01 bar to 60 bar), and the instrument limit pressure is 10 MPa (100 bar). Do not use the instrument if the tested equipment exceeds the instrument range.<\/p><\/div><\/details><details><summary>What Batteries Does LM120 Use?<\/summary><div class=\"autool-faq-answer\"><p>LM120 uses 4 \u00d7 1.5V AA \/ LR6 batteries. Replace the batteries when the low battery sign appears to avoid affecting normal use. Batteries may not be included, depending on shipping and package configuration.<\/p><\/div><\/details><details><summary>What Should I Check Before Pressure Leak Testing?<\/summary><div class=\"autool-faq-answer\"><p>Check pipe fittings, hoses, and valve stems before testing. If any damage is found, replace the part immediately to avoid improper use or accidents. During leak testing, LM120 records initial pressure, instantaneous pressure, pressure difference \u0394P, and test duration.<\/p><\/div><\/details><details><summary>What May Cause Refrigerant Filling Failure?<\/summary><div class=\"autool-faq-answer\"><p>Refrigerant filling failure may be related to hose connection direction, system pipe or connector issues, or air remaining in the hose. The middle refrigerant inlet has a valve-core port used to vent air after connecting refrigerant to the instrument. Tighten the copper plug screw before or after each operation and check the refrigeration system pipes and connectors.<\/p><\/div><\/details><details><summary>What Is The Difference Between LM120 And LM120+?<\/summary><div class=\"autool-faq-answer\"><p>LM120 is the core digital manifold gauge model for vacuuming mode, refrigerant mode, and pressure leak testing. LM120+ keeps the main LM120 workflow and adds trichromatic tube and two wired temperature clamps according to the comparison chart. Choose based on whether you need the added accessory configuration.<\/p><\/div><\/details><details><summary>How Should I Maintain And Store LM120?<\/summary><div class=\"autool-faq-answer\"><p>Keep the instrument dry and avoid hot, humid, or non-ventilated storage. Check tightened and connected parts regularly, treat parts that contact chemical media with anti-corrosion care when needed, avoid corrosive liquids, and do not overload the instrument.<\/p><\/div><\/details><details><summary>How Long Is The Warranty?<\/summary><div class=\"autool-faq-answer\"><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><\/div><\/details><\/div>\r\n<\/div><\/section><\/main><\/div>\r\n\r\n","protected":false},"excerpt":{"rendered":"<ul>\n<li><strong>Dual-Pressure Manifold:<\/strong> Read high- and low-side gauge pressure together, with dedicated valves for direct control during the service sequence.<\/li>\n<li><strong>Temperature-Based SH\/SC:<\/strong> Select the correct refrigerant and connect compatible probes to display two pipe temperatures and calculate superheat or subcooling; probe inclusion varies by package.<\/li>\n<li><strong>Vacuum, Hold + Charge Modes:<\/strong> Supports vacuum monitoring, timed pressure-retention testing, and refrigerant-charging assistance.<\/li>\n<li><strong>Backlit Multi-Unit Display:<\/strong> Switch pressure and \u00b0C\/\u00b0F units on the large backlit LCD.<\/li>\n<\/ul>\n","protected":false},"featured_media":55098,"comment_status":"open","ping_status":"closed","template":"","meta":{"_gspb_post_css":""},"product_brand":[448],"product_cat":[1072,1075],"product_tag":[952,940,939],"hf_cat_product":[4547],"class_list":["post-25118","product","type-product","status-publish","has-post-thumbnail","product_brand-autool","product_cat-automotive-repair-maintenance-equipment","product_cat-smart-digital-manifold-gauge","product_tag-a-c-refrigerant-service","product_tag-measurement-tools","product_tag-multi-warehouse-shipping","first","instock","shipping-taxable","purchasable","product-type-variable"],"meta_box":{"autool_archive_segment":"A\/C refrigerant service","autool_primary_use_case":"A\/C refrigerant recovery, manifold measurement or leak diagnosis","autool_customer_focus":["measurement accuracy","warehouse \/ delivery location"],"autool_source_summary":"- A\/C Service Ready: Designed for refrigerant recovery, manifold measurement, or leak-related A\/C service tasks in workshop use. - Decision Points Up Front: The short description is structured to surface practical buying","autool_model_family":"LM120","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\/25118","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=25118"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media\/55098"}],"wp:attachment":[{"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/media?parent=25118"}],"wp:term":[{"taxonomy":"product_brand","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_brand?post=25118"},{"taxonomy":"product_cat","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_cat?post=25118"},{"taxonomy":"product_tag","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/product_tag?post=25118"},{"taxonomy":"hf_cat_product","embeddable":true,"href":"https:\/\/autoolstore.com\/wp-json\/wp\/v2\/hf_cat_product?post=25118"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}